When discussing the lighting for the bukkake in TFH, and Jeff said "Easier said than done. Lighting one of these things is like trying to light a prison riot."
Why not shoot it in a prison yard or a cell block setup. Have all the convicts revise their real life roles and dress in prison garb and have the girl wander in by accident during the exercise period. The convicts encrust the whore, the bell rings, and the convicts head back to their cells.