In English you go to the bank, sit in the kitchen and wait at the station. Italian usually leaves the article out for these everyday destinations and rooms. It says in banca, in cucina and in stazione, not nella banca or nella cucina. A few very common places use a instead: a casa, a scuola, a letto.
English speakers trip over this because English is inconsistent. We say at home and at school with no article, but at the bank and in the kitchen with one. Italian treats a much bigger group of places like English treats home and school.
Word list
aeroportomA1airportin aeroporto = at/to the airport; or all'aeroportoalbergomA1hotelin albergo = in the hotel; dormire in albergoaulafA1classroomin aula = in the classroombagnomA1bathroomin bagno = in the bathroombancafA1bankin banca = in the bank; a specific one: nella banca accantobibliotecafA1libraryin biblioteca = in the library; studiare in bibliotecacaffetteriafA1coffee shopin caffetteria = at the cafécamerafA1bedroomin camera = in the bedroomcamera da lettofA1bedroomin camera da letto = in the bedroomcasafA1housea casa = at home / homechiesafA1churchin chiesa = to/at churchcittàfA1cityin città = in/into town; vado in cittàclassefA1classroomin classe = in classcucinafA1kitchenin cucina = in the kitchenfattoriafA1farmin fattoria = on a farm; vivere in fattoria = live on a farmgiardinomA1gardenin giardino = in the gardenhotelmA1hotelin hotel = in the hotel; alloggiare in hotellettomA1beda letto = in/to bed; sul letto = on the bedmontagnafA1mountainin montagna = in/to the mountains; vado in montagnanegoziomA1storein negozio = in the store; essere in negozio when the shop is understoodospedalemA1hospitalin ospedale = to/in hospitalsalafA1roomin sala = in the living room / main roomsalottomA1living roomin salotto = in the living roomscuolafA1schoola scuola = to/at schoolsoggiornomA1living roomin soggiorno = in the living roomspiaggiafA1beachin spiaggia = at/to the beachstazionefA1stationin stazione = in the station; or alla stazionestradafA1streetin strada = in the streettavolafA1tablea tavola = at the table; a tavola! = dinner's readya casaA2at homea casa = at home; sono a casa = I'm at homeandare a casaA2to go homeandare a casa = to go home; vado a casa = I'm going homeandare a lettoA2to go to bedandare a letto = to go to bed; vado a letto prestoascensoremA2elevatorin ascensore = in the lift; salire in ascensorecasafA2homea casa, in casa = at home; not alla casa for your own homecattedralefA2cathedralin cattedrale = at/to the cathedral; messa in cattedralecortilemA2courtyardin cortile = in the courtyardduomomA2cathedralin duomo = in/to the cathedralfabbricafA2factoryin fabbrica = in the factory; lavorare in fabbricafarmaciafA2pharmacyin farmacia = in the pharmacy; andare in farmaciagaragemA2garagein garage = in the garagegelateriafA2ice cream shopin gelateria = in the ice cream shop; andiamo in gelateriain casaA2at homein casa = at home; stresses being indoorslibreriafA2bookstorein libreria = in the bookstore; comprare un libro in libreriamoscheafA2mosquein moschea = at/to the mosquepaesemA2villagein paese = in the village; torno in paesepiazzafA2squarein piazza = in the squarepiscinafA2swimming poolin piscina = in the swimming pool; andare in piscinapostafA2post officein posta = in the post office; andare in posta = go to the post officerestare a casaA2to stay at homerestare a casa = to stay home; resto a casa staserarimanere a casaA2to stay at homerimanere a casa = to stay home; rimango a casasala da pranzofA2dining roomin sala da pranzo = in the dining roomstare a casaA2to stay at homestare a casa = to stay home; sto a casa oggiteatromA2theatera teatro = to/at the theatre; andiamo a teatrotornare a casaA2to go hometornare a casa = to go home; torno a casa alle seiufficiomA2officein ufficio = to/at the officeagenzia di viaggifB1travel agencyin agenzia di viaggi = to the travel agency; andare in agenzia = go to travel agent'sandare in campeggioB1to campandare in campeggio = to go campingbottegafB1storein bottega = in the store; lavorare in bottega = work in the shop/workshopcarceremB1prisonin carcere = in prison; essere in carcerecentromB1downtownin centro = downtown / into town; vado in centroclinicafB1clinicin clinica = in the clinic; essere in clinicadiscotecafB1nightclubin discoteca = in the nightclub; andare in discotecafatto in casamB1homemadefatto in casa = homemade; agrees: torta fatta in casagalleriafB1tunnelin galleria = in the tunnel; il treno è in galleria = the train is in the tunnellaboratoriomB1laboratoryin laboratorio = in the laboratory; lavorare in laboratoriominierafB1minein miniera = in the mine; lavorare in miniera = work down the minemonasteromB1monasteryin monastero = in the monastery; entrare in monastero = enter a monasterymunicipiomB1city hallin municipio = in the city hall; andare in municipio = go to the town hallofficinafB1workshopin officina = in the workshop; la macchina è in officinapalestrafB1gymin palestra = in the gym; allenarsi in palestrapanetteriafB1bakeryin panetteria = in the bakery; comprare il pane in panetteriaparlamentomB1parliamentin parlamento = in parliament; entrare in parlamentoportomB1portin porto = in port; la nave è in porto = the ship is in portprigionefB1prisonin prigione = in prison; essere in prigionetendafB1tentin tenda = in a tent; dormire in tenda = sleep in a tentterrazzafB1terracein terrazza = on the terrace; mangiare in terrazza = eat on the terraceterrazzomB1terracein terrazzo = on the terrace/balconycantinafB2basementin cantina = in the cellar / basementcommissariatomB2police stationin commissariato = to the police station; andare in commissariato = go to police stationcorridoiomB2corridorin corridoio = in the corridor; aspetta in corridoio = wait in the corridormansardafB2atticin mansarda = in the attic; dormire in mansarda = sleep in the attic roompinacotecafB2art galleryin pinacoteca = to the art gallery; andare in pinacoteca = go to the art gallerysala d'aspettofB2waiting roomin sala d'aspetto = in the waiting roomsala d'attesafB2waiting roomin sala d'attesa = in the waiting room; aspettare in sala d'attesasinagogafB2synagoguein sinagoga = at/to synagoguesoffittafB2atticin soffitta = in the atticsolaiomB2atticin solaio = in the attictribunalemB2courthousein tribunale = in/to courtborsafC1stock exchangein Borsa = on the stock exchange; investire in Borsa = invest on the stock exchangecantieremC1building sitein cantiere = on the building site; lavorare in cantiere = work on the building sitemagazzinomC1warehousein magazzino = in the warehouse / in stockpistafC1runwayin pista = on the runway; l'aereo è in pista = the plane is on the runwayscuderiafC1stablein scuderia = in the stable; i cavalli sono in scuderia = the horses are in the stablestallafC1stablein stalla = in the barn; le mucche sono in stalla = the cows are in the barnmanicomiomC2asylumin manicomio = in the asylum; finire in manicomio = end up in an asylumsala operatoriafC2operating roomin sala operatoria = in the operating theatresenatomC2senatein Senato = in the SenateserrafC2greenhousein serra = in a greenhouse; coltivato in serra = grown in a greenhouse
How it works
The pattern is simply a or in followed by the noun without an article. It works for going somewhere and for being somewhere, so in ufficio means both to the office and at the office.
Only three common places take a: casa, scuola and letto. The others take in. The rule of thumb: when you mean the usual, generic place (your kitchen, your bank, the pharmacy you normally go to), drop the article.
Stasera resto a casa e vado a letto presto.
(Tonight I'm staying home and going to bed early.)
Vado a scuola in autobus.
(I go to school by bus.)
The words
Home and bed
Casa gives many fixed chunks: a casa and in casa (at home), andare a casa and tornare a casa (to go home), restare a casa, rimanere a casa and stare a casa (to stay home), and fatto in casa (homemade). With letto you get a letto and andare a letto.
Questa torta è fatta in casa.
(This cake is homemade.)
Rooms and spaces at home
In cucina, in bagno, in soggiorno, in salotto, in sala, in sala da pranzo, in camera, in camera da letto, in cantina, in soffitta, in garage, in giardino and in cortile.
La mamma è in cucina e il papà è in garage.
(Mum is in the kitchen and Dad is in the garage.)
I bambini giocano in giardino.
(The children are playing in the garden.)
School and work
A scuola, but in classe and in aula for the classroom. For work you say in ufficio, in fabbrica, in laboratorio and in officina.
Lavoro in ufficio dal lunedì al venerdì.
(I work at the office from Monday to Friday.)
Services and shops
In banca, in posta, in farmacia, in biblioteca, in libreria, in panetteria, in gelateria, and in negozio when it's clear which shop you mean.
Domani vado in banca e poi in farmacia.
(Tomorrow I'm going to the bank and then to the pharmacy.)
Institutions, travel and free time
In ospedale, in clinica, in chiesa, in carcere, in prigione, in albergo, in hotel, in stazione, in palestra, in piscina, in discoteca, and andare in campeggio (to go camping). Out in town you also say in piazza and in strada.
Mio padre è in ospedale e mia madre è in banca.
(My father is in hospital and my mother is at the bank.)
Il sabato vado in palestra e la domenica in chiesa.
(On Saturdays I go to the gym and on Sundays to church.)
Ti aspetto in stazione alle otto.
(I'll wait for you at the station at eight.)
Quest'estate andiamo in campeggio.
(This summer we're going camping.)
Watch out
A specific place brings the article back
As soon as you add a detail that picks out one particular place, you need the article combined with the preposition: nella banca accanto, nella cucina di mia nonna, alla stazione di Milano, all'ospedale San Carlo.
Vado nella banca accanto al supermercato.
(I'm going to the bank next to the supermarket.)
Not every place follows the pattern
Many common places always take a plus the article: al bar, al cinema, al ristorante, al supermercato, al museo, al mare. Learn these as chunks, and don't guess from the English.
Stasera andiamo al cinema.
(Tonight we're going to the cinema.)
Small variations
For the station, both in stazione and alla stazione are common. A letto means in bed or to bed, but lying on top of it is sul letto. For home, a casa is the everyday choice, while in casa stresses being indoors.
Summary
For everyday places and rooms used in their usual, generic sense, Italian puts no article after the preposition: a casa, a scuola, a letto, and in plus the noun without an article for most others (in banca, in cucina, in ufficio). Add the article only when you point to one particular place (nella banca accanto), and memorise the exceptions like al bar and al cinema as fixed chunks.