For me, nothing beats Vertigo on an uncrowded night at sunset. Since the last time it was 'uncrowded' at sunset was during the early days of the 2006 coup, I've been going to Above 11 on Suk. 11 recently and liking it a lot. I've also been following that with dinner at the very hip and mostly delicious Indian restaurant (Charcoal) downstairs. It's not Gaggan, but of course, nothing is. And speaking of 'uncrowded', thank you San Pellegrino list for making certain I won't ever be getting a table there again...I won't ever be drinking your water again either.

Alternatively, Park Society and Long Table are both great rooftop bars IMHO.