Both Graham Parker and stylistic stepson Elvis Costello have newretrospectives out, but it makes sense that it would be the pioneering pub-rocker who hits the American club circuit to promote his. First, he lives in New York rather than Ireland; second, he never did share Costello’s megalomania. At 9:15 p.m. at the Bayou, 3135 K St. NW. $15. (202) 333-2897. (MJ)