Okay so when I was younger I was wantching a movie with my grandpa and from what I remember, a girl Was at a party of some sort and basically got stolen from the party and this man took her to this house thing with like stalls or something and basically raped her. There were many other girls there too. I don’t know if it was sex slavery or like prostitution but there were lots of men and women.
This doesn’t really fit, but maybe Kiss the Girls?
http://www.imdb.com/title/tt0119468/?ref_=nm_flmg_act_35