"Why does the public expect entertainers to behave better than everybody else?" comedian CHRIS ROCK writes in his 1997 memoir, Rock This! "It's ridiculous. ... Of course, this is just for black entertainers. You don't see anyone telling Jerry Seinfeld he's a good role model. Because everyone expects whites to behave themselves. ... Nowadays, you've got to be an entertainer and a leader. It's too much." Yet Rock could easily be called a leader; he places the black experience in compelling and hilarious context with brutal honesty and cutting wit. It's a shame that the actor, writer, director and creator of the TV series "Everybody Hates Chris" isn't even more successful. (He's already been ranked the No. 5 stand-up comedian of all time by Comedy Central.) But the title of his tour, which rolls into the Fox Theatre Fri.-Sat., MARCH 21-22, says it all: No Apologies. $45.50-$75. 7:30 p.m. 660 Peachtree St. 404-817-8700. www.foxtheatre.org.