XS was the most impressive nightclub I've ever been to. I went with my friend to see Avicii on a busy weekend. We were given free entry and three complimentary drink tickets (which ends up being a $30 value because drinks are insanely expensive there). We had been warned about long waits to enter, but much to our delight, we did not have to wait in line to get in. The people working the door were very quick and efficient.
I was astounded when we walked in. The pool bar was beautiful and extravagant. There are several different bars/themed rooms, based on what you're in the mood for.
Avicii was playing in the main room. Entrance into the show was an extra $25, but I was fine with that price to see him. We ended up super close to the stage. It was an awesome experience.
We loved the bar and dance floor in the main room. The lighting, special effects and sound was excellent. The drinks were also delicious and very strong! Our favorite drink was the "Adios Motherf*cker."
The lines for the bars and bathrooms very never obnoxious. The security is very conscientious and helpful. I would go back any time. I would also recommend XS to anyone looking for a fun night out in Vegas.