Walla Walla's hometown roller derby team faces off against the Aftershocks Roller Rebels in a "Boss Babes" themed bout. A fundraiser at the event helps support The Moms' Network. Doors open at 5:30 p.m. Bout starts at 6 p.m. Advanced tickets are $8 and available at Book & Game Co., Western Paladin Games, the YMCA, and brownpapertickets.com. Kids 10 and younger get in free.