My wife and I were recently in Vegas and visited Marquee, XS, Drai's, Tao, and LiFE. We visited LiFE on an Saturday and I have to say we really liked LiFE. The music was great and the crowd was just the right amount of people. It didn't really fill up until midnight or so unlike other clubs, but we liked this. If you're looking for a club with great EDM music and not getting pushed over on the dance floor, this is the place to hit up. The bartender was really friendly and even gave us a free shot.
Lastly, big thanks to Ryan Henderson @ 510-386-0233 who got us on the guest list and helped us out with getting drinks -- if you're in Vegas and need help with guestlist/bottle service, definitely give him a call/text. He was very responsive which is always nice to find in a promoter. Will be back next time we're in Vegas...