Fridays are for pub crawls and Saturdays for movies. Wednesday is a night to go riding. And there's no better outfit to tag along with than the Belleville Area Biking & Eating Society. The BABES (as they call themselves) hitch up every Wednesday at 6:15 p.m. Three possible routes, usually ranging between 13 and 26 miles, begin and end at a different restaurant. After the haul everybody whips off their helmet and Spandex and whistles for barbecue plates and pitchers or whatever happens to be on tap for the evening. Most often the rides cover the best of southern Illinois' rolling terrain, but some rides originate on the Mississippi's west side, one of the most popular being the Sunday-morning Donut Trail Ride through south St. Louis. (Boo-yah!) Subscribe to Roger Kramer's e-letter via the Web address above for the latest info. Newcomers are always welcome. The rides are free for members of Hostelling International, $3 for nonmembers.