Tryst is surprisingly a beautiful club in Vegas. As a guy in his 20's, you don't really hear about Tryst as much as you hear about the other clubs. The setup of Tryst is very similar to XS. Decent sized dance floor with VIP tables placed around the dance area. The waterfall that they have is pretty random, but it looks beautiful. The crowd here is in their mid twenties on up.
**If you are a girl you can get in for free if you meet a promoter. The promoter will also most likely give you tickets for free drinks which is always a plus since some clubs will only offer you free champagne.
Personally, I prefer some of the other clubs in Vegas, but this is a decent venue if you need a different scene versus your normal clubs that you go to.