Denver Swim Club is by far the best. Check out there web site to get info.
http://www.denverswimclub.com/index.html
Sunday afternoons are the best for action. I love the orgy room the best. Can get lots of guys fucking and sucking at the same time. To the point that you can't get around in the room theres so much going on.
I go almost every sunday.
- RealSex