Punk-ska with attitude from the former and a horn section from the latter, Buck O Nine covers Operation Ivy and Musical Youth (“Pass the Dutchie,” no less). The San Diego septet’s slacker manifesto, however, is an original: “Calling In Sick.” With Suicide Machines at 9:30 p.m. at 9:30 Club’s Atlantis, 930 F St. NW. $5. (202) 393-0930. (MJ)