I've been to over a dozen of clubs in Vegas and The Act is by far the most unique of them all.
I've been here twice. Both times we had bottle reservations. I highly recommend that with every club so that you have dedicated real estate for the entire evening.
Don't come here if you are prude and conservative. The Act is intended to induce you with all of the sins that the city is known for. From the decor, costumes, and "acts"... it's only obvious that you should expect debauchery at it's finest.
The music here is perfect to my liking. It's open format which is a mix of EDM, Top-40, and Hip-Hop. All of which I personally love. The atmosphere is sexy and the crowd is mixed. You'll see all types and age ranges here. The Act is still so new that it is still trying to draw the right crowd and create its character.
It's a split-level club that navigates your focus to a main room that has two stages. The main stage hosts the majority of the "acts" while the smaller stage in the middle is a pseudo performance and dance area. The club itself isn't that big and the windy halls are confusing to navigate at times. That and crowd (at times) are my only gripes, yet they are small ones. The performances are entertaining and a nice change of pace between DJ sets. Overall it's one of my favorite new hot spots.