It’s a Tuesday night on Mission Street — but if you stumble upon The Knockout on Mission at the end of Valencia, you might think it was Saturday. Dozens of bodies, dressed in everything from patched-up vests to cherub-print pants, are expressing their anguish as punks do, so bodies are slamming into one another, sending an occasional PBR can flying through the air. It’s exactly what Scott “Alcoholocaust” Rogers would have wanted. The legendary punk promoter died from cancer in June. This week, proud deviants have been gathering to sip, thrash around and honor Rogers’ legacy in torn up T-shirts, mullets and rolled-up beanies.