MONDAY We’re guessing that our readers probably have at least a passing familiarity with Ana Marie Cox and at least one of her two millennium straddling web-based glories: Suck and Wonkette. Well, Cox is leaving it all behind for content that won’t be found in your RSS feed: her debut novel, Dog Days, is out and she will be dishing and signing tonight at Politics and Prose, 5015 Connecticut Ave. NW., 7 p.m. TUESDAY You…