Ultra Music Festival falls somewhere between the anthropophobia-inducing chaos of your nightmares and the hallucinatory party extravaganza of your dreams. Even if you know nothing about techno, you'll recognize names like Ice Cube, Major Lazer, and Ty Dolla $ign on the lineup. But true devotees of the uhntz will show up for Carl Cox, Underworld, and a gazillion other DJs and performers who'll fill the air around Bayfront Park with rib-shuddering rhythms for three full days. 4 p.m. Friday and noon Saturday and Sunday at Bayfront Park, 301 Biscayne Blvd., Miami; ultramusicfestival.com. General-admission tickets are sold out; three-day VIP tickets cost $1,249.95.