Chilly kneecaps. A busload of 60 polka enthusiasts from LaCrosse fast-stepped, sang and hollered through the Chicago Loop with their hometown Oktoberfest parade float. LaCrosse festmaster Mike Bakalars called it a Bavarian representation from Wisconsin in the three-hour Chicago Thanksgiving parade. It was chilly. Yes, der herrs were in lederhosen and the fraus in dirndl.