Performance art spiked with fervent music for good measure, the highly competitive Drum Corps International marches to the beat of a different drum. No slouch on the field, the DRUM CORPS INTERNATIONAL SOUTHEASTERN CHAMPIONSHIP marries maddeningly smooth marching skills with bad-ass percussive polyphony at the Georgia Dome Sat., JULY 25. The U.S.-based drum and bugle corps hail from more than 15 countries, with members between the ages of 13 and 21, and play their way through an annual tour of more than 100 events throughout North America. Two dozen marching bands perform, including our very own Atlanta CorpsVets and Alliance. $30-$55. 4 p.m. 1 Georgia Dome Drive. 404-249-6400. www.ticketmaster.com.