Hold off the jammers – probably the best advice you can get as a blocker for the ATLANTA ROLLERGIRLS. Because when the jam starts, they're doing everything they can to score as many points as possible. The Sake Tuyas will square off against the Toxic Shocks for Round One, and then the Atlanta B-team the Rumble B's face the Rogue Rollergirls of Fayetteville, N.C., for Round Two. $12-$30. 5 p.m. Yaarab Shrine Center, 400 Ponce de Leon Ave. www.atlantarollergirls.com.