Acclaimed in the mid-’50s for his shouted R&B vocals, singer Nappy Brown eases into a more leisurely paced blues style on much of his recent I’m a Wild Man. However, on “Who, What, Where, and When” (and the title cut), this 66-year-old North Carolina native’s trills and wails demonstrate the accuracy of the album’s title. Brown will be backed at the annual D.C. Blues Society winter concert by local pianist Daryl Davis, who possesses an encyclopedic knowledge of ’40s to ’60s swinging sounds, whether from juke joint or church. Davis will also perform a set of boogie-woogie blues with his own band. Longtime D.C. area blues and soul unit Whop Frazier & Friends by Choice will open at 5 p.m. at the Bayou, 3135 K St. NW. $8-12. (202) 333-2897. CP