•Mah Jongg. Wednesdays, 1 p.m. Age 55 and older. Free.

•Pinochle. Wednesdays and Fridays, 9:30 a.m. Age 55 and older.

•What to be Alert to After Signing up for Medicare. Learn how to get the most out of coverage and reduce problems or confusion. To register, call 410-313-7391.

Longwood Senior Center

6150 Foreland Garth, Columbia. 410-313-7217.

•Art Therapy. Second and fourth Friday, 11 a.m.-noon.

•Coffee and Game Social. Tuesdays and Thursdays, 10 a.m.-2 p.m.

•Computer Classes. Monthly, 11 a.m.-2 p.m. Free. Call center for dates and description.

•Group Exercise. Wednesdays and Fridays, 9-10 a.m. Free.

•Line Dance. Mondays, 1-2 p.m.

•Yoga. Most Wednesdays, 10-11 a.m. Call center to confirm dates. Donation.

Master Gardener Series: Gardening for Seniors

May 14, 7 p.m. This presentation highlights modifications that can be made to garden areas to accommodate the more limited mobility and flexibility of older or disabled gardeners. Historic Oakland, 5430 Vantage Point Road, Columbia. To register, tcvillage@columbiavillages.org or 410-730-4744.

North Laurel50+ Center

9411 Whiskey Bottom Road, Laurel. 410-313-0380.

•Agewell Exercise Class. Tuesdays and Thursdays, 10 a.m. Sixteen classes for $35.

•Billiards. Weekdays, 9 a.m.

•Blood Pressure Screening. Tuesdays, 10:30 a.m.

•Computer Classes. Call for descriptions of offerings.

•Enhance Fitness. Mondays, Wednesdays and Fridays, 11:15 a.m. Sixteen classes for $51.