Tucson Roller Derby's next bout is Saturday, Aug. 9. It's Furious Truckstop Waitresses vs. VICE Squad. Doors open at 6:30 p.m. Tickets are $10 in advance and $15 at the door. Discounts to youth 10-17, kids younger than 10 are free with paying adult. Tucson Indoor Sports Center, 1065 W. Grant Road. Food and drink available. Visit www.tucsonrollerderby.com for more info.