Calling all moshers! “Keeping It Old School” is the theme of this year’s Punkfest, a counterculture explosion that’s 29 years strong this year. Thanks to punk scene instigator Tony Chainsawww (who’s been booking bands since ’86), a goodly number of brain cells and eardrums will be damaged on Saturday (when Prevail Within, Ticket for a Trainwreck, Nuklear Fishsticks, So Unloved, Broken Spokes, Oi! Dollz, and U.Y.U.S. bang in 2011 at the Ten Eleven) and Sunday (when the Deceased, the Bad Ones, F.A.T.M.D., Sans Faith, Evil Come Evil Go, Sideline Rookies, and Creeping Tomz — the only rockabilly band playing the fest — detonate Nightrocker Live). Day 1: $7, doors at 7pm Sat, Jan 1, the Ten Eleven, 1011 Avenue B. Day 2: $5, doors at 8pm Sun, Jan 2, Nightrocker Live, 605 San Pedro.