Jon Spencer may not be the hardest-working man in show business, but he’s sure trying. He divides his time between fronting the Jon Spencer Blues Explosion and being the guitarist/noisemaker for Boss Hog. He and wife Christina, Boss Hog’s guitarist/vocalist, are both veterans of NYC’s Pussy Galore; their music is crude in both senses of the word, but it kicks the tar out of today’s Bush-league bands. With Sugarsmack at 10:30 p.m. at the 9:30 Club, 930 F St. NW. $9. (202) 393-0930. (Ben Buja)