Remember in high school, how your best friend had the coolest sister? You know, the one who loaned you her smokes and bought you beer with her fake ID and laughed at dirty jokes? She's still cool as hell, and now she's skating for the championship Saturday. Tacoma's original roller derby league - Dockyard Derby Dames - will roll onto the track for their final bout of their ninth season at Pierce College.  First up, the Trampires battle the Whidbey Island Rollergirls. Then, reigning champs, the Marauding Mollys, take on the fearsome green machine, the Femme Fianna, for the Championship trophy while hundreds of spectators jump around and scream their lungs out. Grab a spot on the bleachers, or if you're really up for it, hang in the beer garden, where your own protective gear is probably a wise idea, and enjoy a night of good ol' fashion bruising. After party to follow at The Fan Club.

DOCKYARD DERBY DAMES CHAMPIONSHIP, 6 p.m., Pierce College Health Education Center, 9401 Farwest Dr., Lakewood, $7-$15, dockyardderbydames.com