It’s a gross overgeneralization to call Biohazard a rap-metal band, but what the hell? The quartet brings the label on itself, what with its gangsta moves, rapper associations, and frequent melodic nods to hiphop. Nonetheless, the Brooklyn natives’ fiery hardcore is actually more eclectic, informed by Black Sabbath as much as Public Enemy, with the requisite dose of urban spite thrown in. Opening are Boston metal/punk quartet Stompbox and New York noise trio Unsane at 8:15 p.m. at the 9:30 Club, 930 F St. NW. $12. (202) 393-0930. (Steve Kuhn)