B On Top
The slick rooftop bar of the Gansevoort Meatpacking NYC hotel would be worth visiting even without its sweeping Hudson River and Manhattan views. Sleek and glossy, B On Top has blue Portuguese tiles, an abundance of natural light, cool furnishings, and sexy servers. The music isn't too loud, and there is ample space—indoors as well as out. Cocktails are predictably pricey, but there are weekday happy-hour specials from 5 to 7 pm.