New York

The team behind this whimsical "Versailles in the sky" (henceforth XVI, as in "Louis the") leaned on their experiences at Pink Elephant and Juliet Supperclub -- and a Miami design heavyweight -- to assemble phantasmagorical elements including a giant gilded projection screen, tentacle-like "trees" that writhe towards the sky, and a 50ft wall covered in faux grass (don't worry, you'll still be totally high).