When he steps up to play his trumpet, Kermit Ruffins spills passion from every pore. But he spills a little barbecue sauce, too. The New Orleans composer became obsessed with music after hearing a record of his idol Louis Armstrong playing from a jukebox, and since then, Ruffins and his band, the Barbecue Swingers, have become famous for cooking barbecue at their shows between sets. For Ruffins, it’s all about having a good time; as he says, “That’s really the only way I can do it anymore.” See him sport his trademark fedora and winning smile on Sunday, March 24, at the Sweetwater Music Hall. 19 Corte Madera Ave., Mill Valley. 8pm. $20. 415.388.3850.