We all know Warren Hellman as the guy behind the annual Hardly Strictly festival, but bet you didn't know that the bluegrass aficionado was also a lean, mean, banjo-playing machine. That's right, Hellman is a member of The Wronglers, who will have their big debut at Slim's this Sunday. The old-time band, which formed back in 2006, has performed all over the Bay Area (including at Hardly Strictly)—opening for the likes of Steve Earle and Gillian Welch—as well as at SXSW.

This weekend, they'll join sagebrush soul master Jimmie Dale Gilmore onstage at Slim's. Three-time Grammy nominee, Gilmore has collaborated with The Wronglers on Heirloom Music, due out this spring. The show will be a special sneak preview of this new material before the two head off to SXSW. Don't miss it—there will be a raffle for the chance to win a pair of Friends and Family passes for 2011's HSB festival.

$10; Sunday, 3/13, 5 p.m., Slim's, 333 11th St.