Here are some images of the interiors used in the tv series Girls
The set design is not particularly interesting except for maybe the space of the room of the character Charlie. In the series he complains to his girlfriend (forgot her name, just Google it yourself) that she never has shown any interest in where he lives. It seems that until the second season she has not even been to his room (probably due to production costs most of the characters are kept in one room). But then we see Charlie’s room, and what a man cave it is!

Floor plan of Charlie’s rather spacious room

Sketch of the space designed by the series’ production designer Laura Ballinger Garnder

View of the actual set

Detail of the bed