Self-defense -- Tim Belton (left) of Savvy Self Defense teaches a continuing class in street survival, stressing effective self-defense techniques that work in conditions of stress. The class, which is held from 12:15 p.m. to 1:15 p.m. Tuesdays and Thursdays at Slayton House in the Wilde Lake Village Center, is also designed to increase flexibility, strength and cardiovascular health. The first class is free for new participants. The cost is $50 a month; $8 to drop in. Columbia residents can request at 10 percent discount. Registration is recommended. 410-710-3987.