If you're going to see comedian John Witherspoon tonight at the Improv, where he performs at 7:30 and 10, you'd better dress up — because "you got to coordinate," as he puts it. That catchphrase is just one of the comedian's many accomplishments during his long career. He's worked alongside famous comedians such as Ice Cube, Adam Sandler, Eddie Murphy and Chris Tucker and starred as "Pops" on The Wayans Brothers. But he might be best known for voicing "Grandad" on the animated series The Boondocks. His standup is even similar to the Boondocks character he portrays; it features fast-paced jokes that keep coming at you. Witherspoon simply has a look about him that's funny. He doesn't even need to tell jokes because his facial expressions can make anyone laugh. He has shows scheduled at the Improv through Sunday. Tickets are $22 to $25. (William Hoffman)