The Greater South Loop Association and Reggie’s combine for the two-day Bash On Wabash. Mixing kids’ bands (The Boogers), kids (School Of Rock), and bands that were popular when your folks were kids (? And The Mysterians), all ages are pretty much literally covered. (As if to cleanse itself, Reggie’s hosts Weedeater andBison BC in its club Saturday night.) Other stars include The Sadies, Andre Williams, White Mystery, and Mathien. (Saturday and Sunday@14th St. and Wabash.)