The Cosmopolitan has quickly established itself as one of the trendiest spots on the Strip. The typical Vegas kitsch has been swapped out for aggressively modern design and futuristic touches (guests sign in on an iPad). Fanfare aside, rooms are large and feature comfortable, designer furnishings and modern, open bathrooms. All types of travelers seem to come here, from frat boys to gambling grandmothers, but the nights decidedly belong to the younger crowd at BOND and Marquee -- as do the days, during Marquee's seasonal "dayclub" party poolside. It's certainly not the most family-friendly option, but couples looking for a phenomenal spa and nearby action won't be disappointed.