Yep, ended up at Marquee both Fri & Sat nights this Vegas trip. Super awesome club? Well, mostly because we were staying at Planet Hollywood & Cosmo was right across the street from us. Didn't feel like cabbing to XS (slightly regretting it...), plus promoter hookups for both nights = free (for the ladies obviously...the lone guy in our party had to pay $25) & speedy entrance.
Marquee is gorgeous, I would say a larger version of TAO (from the same creators). Different levels, music & decor and very maze-like. Indoor & outdoor. Luckily, we went with someone who has been there before, so she showed us all the different rooms without us mindlessly wandering around.
"Boombox" area (I think the 5th floor?) = the best music (mostly hip/hop) if you like the top 40's. The main dance floor (6th floor?) is mostly house. Good variety for those with groups who like both types of music.
Guy to girl ratio was pretty ridiculous for both nights. Lots of girls! I have to say, crowd is (from what I remember) waaaaaaay better looking at XS...or maybe because I spent all my time at the hiphop floor.
3 stars, bumped up to 4 because free & easy guestlist, & proximity bonus. Go get some pizza afterward on the 3rd floor of Cosmo!