Gramercy Park Hotel (lobby and roof)
The Gramercy Park Hotel may as well be one of the sickest galleries in New York. But instead of being ushered into a hush-hush space where rich people talk exuberant prices, you can take a seat in either the lobby or roof bar where you can oogle a Warhol, discuss a Basquiat, envy a Damien Hirst, contemplate a Keith Haring, and so on. While the art eye candy is free, the rooftop bar is definitely not—so don't show up with an empty wallet.
(Images courtesy of the Gramercy Park Hotel)