I have been to Chandelier a few times, it's really beautiful. Go to the 2nd (in between) level and order the Lemon Verbena, not on the menu. Pay an extra couple dollars each to get extra flowers for everyone in your group. You chew the flower (don't swallow) and it will do a weird frothing thing in your mouth for at least 5 minutes. It feels like there's a little fountain in there. The first time, my boyfriend gave me one and I hit him afterwards. But of course I had to repay the favor to my group of 5 the next time I was in Cosmo with a Bachelorette party. VERY entertaining to watch the facial expressions of your friends! And well worth the $23 I spent for the drink + another 3 flowers.
Chandelier is always hoppin even at 4 or 5 a.m. Why only 4 stars? One time they made me a terrible cocktail. Also, the bartenders at the bar itself tend to be really bitchy... at least to women.