The phrase “traditional European folk music” might not conjure up the most raucous scenes; perhaps (after years of observing attendees at the Smithsonian Folklife Festival) you picture a bunch of earnest white people holding hands, dancing in a vague, rhythmless circle. Tropicalia’s double bill of Slavic Gypsy–inspired acts, though, should obliterate that staid image altogether. Tuba-and-trumpet-driven opener Raya Brass Band, based in Brooklyn, riffs on a genre whose biggest annual festival, in Guča, Serbia, kicks off in the mornings with cannons being fired. From Baltimore, Orchester Praževica specializes in “turbo folk,” also known as the official background music for the wars in the former Yugoslavia during the 1990s. A little slivovitz, a little dancing, and soon those earnest folk circles of years past will seem downright quaint. Orchester Praževica and Raya Brass Band perform at 9 p.m. at Tropicalia, 2001 14th St. NW. $10. (202) 629-4535. tropicaliadc.com.