Although I will say that Noir bar is a pleasant change of pace when visiting Vegas in terms of ambiance and people-it is totally overhyped.
Don't get me wrong- I like Noir Bar. I enjoy going there-I've been twice. But, all the efforts trying to get your group in and getting on the list, making a reservation, blah blah blah...its too much! Go here with one other person on a chill night. Anything else is going to be a total pain in the ass and will stress you out more than its worth.
The ambiance is nice-very dark with velvet furniture and an intimate, ambient environment. The drinks are very good...made with the best ingredients by experienced and educated mixologists. Make note, no pictures allowed...you don't want to disturb the celebrities, after all! Come here to "be seen"...yea yea its that kind of place. I kind of roll my eyes at these types of super boujie establishments...I mean, they're fun to go to once or twice to say you've been...but come off it people...step down off your high horse.
It is a nice place for an intimate date though, I will say that much.