The irony of comedian MARC MARON is that his dark, satirical brand of comedy will make you giddy with laughter, like when he says, "In most cases, the only difference between depression and disappointment is your level of commitment." A true comic's comic, Maron doesn't chase fame or scour the Web for viral acclaim; he simply tells intelligent jokes in a calm but irritated monotone, and hopes that people find them funny. He's appeared on every late-night show there is, but chances are he's the best stand-up comic you've never heard of. He'll be at the Laughing Skull Lounge for four days. $15-$23. Thurs.-Sat., 8 and 10 p.m.; Sun., 7 and 9 p.m. 878 Peachtree St. 877-523-3288. www.vortexcomedy.com.