As the cultural and social scene shifts from South Beach to Downtown Miami, the cool hotels are following. This 52-story high-rise overlooks the Atlantic on one side and Miami's glittering skyline on the other, enjoyed from floor-to-ceiling glass doors and private balconies. Arrive by yacht to the hotel’s own marina, stop for lunch at the Japanese sushi shrine that is Zuma on the first floor, and head up to the sixteenth-floor terrace for a dip in one of their two pools. Pets are welcome and bikes are ready for loan.