Collocations for crowded - adj.

be
become, get

extremely, fairly, very, etc.
The station was very crowded.

densely
They live in densely crowded conditions.

increasingly
a little, slightly, etc.

with
The store was crowded with shoppers.

Crowded is used with these nouns:
auditorium, bar, bus, city, field, foyer, hall, hallway, mall, marketplace, pavement, place, pub, restaurant, room, shopping centre, sidewalk, slum, street, subway, theatre, train