I went in like probably every other actress did and auditioned for the part. I really thought it very obviously character-driven, especially Serena's role. The script showed some sort of change in dimension in her character, and I felt it wasn't the typical hooker/prostitute.
The men were all scumbags, but the whole point of the film is to show the development of that. Each guy is going in there to have a good time. By and large, these men are career men, family men, and you just see the deterioration of them.