There's a reason why The Chandelier Bar is voted as one of the best bars in America (according to Esquire in 2011). TCB is a multi-level bar inside of the Cosmopolitan. The bar is gorgeous both inside and out. This is a great spot to have a quick drink, meet others, and people watch. On certain nights they have a live band, but the majority of nights a DJ or music in the background. It's trendy, sexy, and my kind of scene.
There is plenty of seating, even on weekends. The service itself is good. Especially if you are frequently ordering drinks or get a bottle (yes you can order bottles here too). Expect the standard Vegas pricing on drinks. Tip: If you are looking for some privacy, stay on the second level. It you are looking to see or be seen, I recommend sitting on the first or third levels.
This place is money... literally in all ways.