Sin sity is heaps of fun for a guy that needs a night of solid sex,
Used to go there heaps when it was free Alcohol, get drunk, have sex with heaps of girls, and if there were no girls that took your fancy just sit around and have a look at the action.
If you go watch out for single girls that sometimes come in after it all starts, they are generally there to have as much sex as they can handle and are absolute firecracker's. I find the couples that go are just there to have a look or play with one of the girls, but you never know. Also bring some alcohol too, to loosen up.