1. Marquee Day Club at the Cosmopolitan
Marquee Day Club is at the Cosmopolitan in Vegas. The topless pool is a favorite and people flock to the area in large numbers for a wild party. When the DJ begins his set, it gets wild and revelers are free to go topless if they please. There is no judgment, it's a free space, and anyone who wants to swim here but avoid the topless swimming can still have fun at two other pools on the premises.