Can’t decide whether to hire a band or a DJ to entertain at your next function? Maybe you should consider inquiring whether the Johnny Artis Band is available. Its human-jukebox frontman delivers his wide-ranging selection of blues-to-rock-and-back covers in styles eerily reminiscent of their originators gruff for Louis, sweet for Aaron. He claims to “do it as good or better” or he doesn’t do it. The Rich Little of R&B and his fiery five-piece band celebrate the release of their new CD, Live Versatility, tonight. It was recorded earlier this year at this very venue, so expect the atmosphere to be preheated at 8 & 10 p.m. at Blues Alley, 1073 Rear Wisconsin Ave. NW. $14. (202) 337-4141. (Daniel Searing)