Upstairs Rooftop Lounge at Ace Hotel
The only thing hipper than the Ace Hotel DTLA is its rooftop lounge, aptly named The Upstairs Bar. Though the roof boasts a pool and lounge chairs, the emphasis isn't really on swimming -- probably because the concrete pool is small enough to be a hot tub. But you're not there for poolside cabanas, you're there for the impeccable drinks and daily event lineup, which includes everything from DJ sets and live concerts to book release parties and yoga classes. Add in stunning city views, and you've got an unquestionable classic in the rooftop game.