Overeaters Anonymous Saturday, 9 a.m. Episcopal Church of the Ascension, 205 S. Summit Ave., Gaithersburg. 240-242-5328. Free.

Drop-in Qi Gong, A fitness instructor leads gentle exercises for relaxation. Saturday, noon. Margaret Schweinhaut Senior Center, 1000 Forest Glen Rd., Silver Spring. 240-777-8085. Free.

“Navigation by Audio,” For people with low vision; Cindy LaBon will discuss audio technologies, demonstrate the benefits of a talking GPS and lead a walk at Rockville Town Square. Meet in the Disability Resource Center. Saturday, 1 -3 p.m., Rockville Memorial Library, 21 Maryland Ave. 240-777-0959 or francie.gilman@montgomerycountymd.gov. Free, registration required.

“Fresh Foods in Schools” discussion An informal meeting on how to improve school food. Sponsored by Real Food for Kids, a Montgomery County parent advocacy group. Saturday, 4-6 p.m. Dawson’s Market, Rockville Town Square, 225 N. Washington St. 301-202-4812. realfoodmcps@gmail.com. Free.

Adventist HealthCare Walking Club Meet in the food court. Tuesday, 8 a.m. Westfield Montgomery shopping mall, 7101 Democracy Blvd., Bethesda. 301-315-3030. www.adventisthealthcare.com/health.

Stroke support groups For caregivers and stroke survivors. Tuesday, 7 p.m.; at 8 p.m., Zurab Nadareishvili, director of the NIH stroke program at Suburban will give a talk. Suburban Hospital, 8600 Old Georgetown Rd., Bethesda. 301-530-3740. Free.

Zumba on the Plaza Stage A fitness instructor from Washington Sports Club leads an outdoor class. Tuesday, 7 p.m. Fountain Plaza Stage at Downtown Silver Spring, 916 Ellsworth Dr. 301-203-4184. Free.

“Wellness Wednesdays” Nurse Leni Barry teaches how to manage blood pressure and reduce the risk of heart attack and stroke with diet, physical activity and stress management. Sponsored by Suburban Hospital. Wednesday, 10 a.m. Margaret Schweinhaut Senior Center, 1000 Forest Glen Rd., Silver Spring. 240-777-8086. Free.

Square dancing and lessons New dancers welcome; casual dress. Wednesday, 7 p.m. North Chevy Chase Christian Church, 8814 Kensington Pkwy. 301-587-5861. www.gerrymanders.net. $6.

— Compiled by Lisa M. Bolton

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