You are just making a rather broad generalization. I belong to a women-only gym, and haven't seen any lesbo-erotic behavior..and I'm a hottie, so I would have been hit on for sure!
The thing I like best about a women-only gym is there are no sweaty grunting muscle boys pumping iron.
When women work out they don't sweat and grunt?
They aren't working out hard enough! Hottie? Any pics?