Letting loose and getting a little wild on vacation is a given in our book. An exotic locale, sexy strangers, zero obligations. Let’s face it – sometimes it’s just more fun to party out of town. Anything goes in the world’s top party cities (we're talking Vegas, Rio, London) and, these days, the coolest carousing goes down at the hottest hotel in town. Bump-and-grind mega clubs, the ever-popular rooftop bar, sexy pool lounges, trendy restaurants, and venues for concerts, movie-screenings, and even sports events – our top 10 party hotels have all the necessities for an all-night rager or two. Best of all, checking into one of these hotel hot spots means you’re guaranteed VIP access to the city’s most coveted nighttime hangouts (a few on our list also have venues reserved for hotel guests only). Plus, no taxis or town cars are necessary; your room is just an elevator ride up (or down, in some cases). So pack your dancing shoes, some aspirin (for some not-so-happening mornings), and get ready to get your groove on at these top party hotels across the globe.