Any band that uses pedal steel, banjo, and extended instrumental interludes can label its music as “roots,” but few harken back to the early American music from which roots music derives. (I’m looking at you, Mumford & Sons and the Lumineers.) Local country swing act the Bumper Jacksons fully commit to the old-timey vibe during their live shows, beating on boxes and blowing on clarinets and trombone kazoos to create the ambiance of a lively New Orleans music hall. On their latest album, Too Big World, the members double down on country references, calling out references to Johnny cakes, venison, and sassafras tea like a waitress at a Deep South diner. Powered by the lungs of vocalists Jess Eliot Myhre and Chris Ousley, the band’s luscious compositions have the power to transport audiences to the Gulf of Mexico, even when they’re in a club on the shores of the Potomac. The Bumper Jacksons perform with Junior League Band at 7:30 p.m. at the Birchmere, 3701 Mount Vernon Ave., Alexandria. $20. (703) 549-7500. birchmere.com.