Tomahawk and Melvins share a rock bill at Washington, D.C.’s 9:30 Club, bringing together two influential acts from the heavier and more experimental corners of alternative music. Tomahawk, fronted by Mike Patton, is known for its genre-blending experimental rock, while the Melvins are long-standing pioneers of sludge and alternative metal. The show pairs distinct approaches to heavy music at one of the city’s most storied live-music venues on the U Street Corridor.