Strapped (2010)

A routine trick propels a tall, dark, cynical hustler into a series of life-changing encounters in this drama. But this amicable and sexually efficient rent boy begins to look at himself differently when he finds himself lost in a maze-like apartment building. As he wanders through the building, he tricks with a variety of johns; sex is the commonality, but out of that commodity comes raw, unguarded emotions for all.

Source: TMDb