It may be the ultimate springtime après scene—in the U.S., at least. When the party kicks off at Cloud Nine, at 11,000 feet at Aspen Highlands, there’s nowhere else you’ll want to be. Make a coveted reservation for the 2 p.m. seating then claim a spot on the south-facing deck with jaw-dropping views of the Maroon Bells. Limber up, loosen those boots, fill your flute, and prepare to dance the afternoon away as the DJ starts spinning club and pop hits. Want to dance on the table in your ski boots? Climb on up. We promise you won’t be alone.