Questions & Answers about Posle bioskopa ću uzeti piće u kafiću.
Because posle means after and it requires the genitive case.
- bioskop = cinema / movie theater (dictionary form, nominative)
- bioskopa = genitive singular
So:
- posle bioskopa = after the cinema / after the movie
This is a very common pattern in Serbian:
- posle škole = after school
- posle posla = after work
- posle filma = after the movie
In this sentence, posle bioskopa means after going to the cinema / after the movie.
Because u can mean either in or to, and the case depends on the meaning.
Here it means in / at a café, so it takes the locative case:
- kafić = café
- u kafiću = in/at the café
Compare:
- Idem u kafić. = I’m going to the café. → accusative
- Sedim u kafiću. = I’m sitting in the café. → locative
In your sentence, the person will get a drink at/in a café, so u kafiću is correct.