(fade scooter sounds under) Hundreds of scooter riders are expected to converge on the Twin Cities this weekend for the fourth annual Scooter Du. It begins Saturday morning with a long ride through the metro area. The group meets at Scooterville, a scooter retailer near the University of Minnesota campus in Minneapolis. Other DU events include an obstacle course ride, a slow race and the ever popular "pile on," where multiple riders squeeze themselves onto a single moving scooter.