Nevada’s Seven Seconds started out sounding like Minor Threat and ended up sounding more like U2. Now that melodic hardcore is marketable, the comebacking quartet will presumably have the sense to return to its roots. With Shades Apart, Unwound, and Clikitat-Ikatowi at 8:15 p.m. at the Black Cat, 1831 14th St. NW. $7. (202) 667-7960. (MJ)