(MUSIC) Any self-respecting Clash fan was probably initially turned off by how closely Tim Armstrong's post—Operation Ivy outfit emulated their heroes, but over the years, the former Gilman Street punks have earned their own bragging rights with a smart swagger and a highly melodic, tightly constructed brand of modern hardcore. They play with the Aquabats and Virus Nine. (Showbox, 1426 First Ave, 632-TIXX. 7 pm, $18 adv, $20 DOS, all ages.)