A battle of the bands needs no instruments, as the U.S. AIR GUITAR REGIONAL CHAMPIONSHIPS prove when the competition comes to Atlanta. Using only stage presence, a strong sense of rhythm and a general mastery of their invisible instruments – what's been dubbed "airness" – locals battle it out for the chance to go national and win the status of air guitar god or goddess. The championship spans 25 cities and promises dancing, goofiness and, of course, sequins and crazy rock 'n' roll 'dos. $10-$12. 8:30 p.m. The Earl, 488 Flat Shoals Ave. 404-522-3950. www.badearl.com.