DJs spin in the lobby and at the Purple Lounge, and spontaneous pool parties erupt nightly behind this retro-future hotel (hanging bubble chairs in the lobby, bean bags in the rooms) from Andre Balazs. Poolside wait service runs until midnight, turning the blue-Astroturf-covered deck into a popular hangout for guests and young Hollywood scenesters. The diner-style restaurant stays open 24 hours, perfect for soaking up the alcohol with some mac and cheese or fries.