Was too blown away by the view from the 50something floor of TheHotel @ Mandalay Bay. This has got to be the best view of the strip. Hands down. Classy club, classy crowd, not-so-classy music (hence lose one star). We had to wait for a bit at the front but it wasn't unbearably long. Once we're in, we knew why there were such a big crowd outside waiting for the bouncer to grow a heart and let them in.
This has a feel of a lounge more than a club. The dance floor was a bit small, and the majority of the area is filled with couches and a narrow walkway between the couches and the bar. If you have an expense account getting a table service is a must.