Jeff Caldwell is a real stand-up guy. At least, that’s what the yuk-inducing name of the comedian’s Web site, standupguy.com, will tell you. It also tells you a little about his act: Caldwell—who’s made recent appearances on The Late Show with David Letterman and The Late Late Show with Craig Ferguson—is known for his clean jokes. “Caldwell delivered an absolutely brilliant set of G-rated observational comedy that brought to mind the likes of such stand-up titans as Jerry Seinfeld and Ray Romano” claims one critic whose praise so succinctly summarizes Caldwell’s act that it’s slapped on the main page of his site. Caldwell may not be for fans of crude and rude comedy, but CBS television executives—who have given him a sitcom development deal—have certainly recognized the power of a profanity-free performance. Caldwell performs at 8 & 10:15 p.m. at the D.C. Improv, 1140 Connecticut Ave. NW. $15. (202) 296-7008.