TUESDAY Got someone in your life who neatly fits within the Young Adult demographic? They’d be pleased as punch to meet China Mieville, whose new fantasy novel, Un Lun Dun, reads like a Pan’s Labyrinth without all the blood-spatter and heavy overtones of European fascism. And, yeah, you grown-ups will probably dig it as well. Politics and Prose, 5015 Connecticut Ave NW, 7 p.m. WEDNESDAY There was a time when “hooking up” really meant something….