Single Again Changing Focus: Single Again, a nonprofit program for adults who are separated, widowed or in the process of divorce, provides weekly presentations and small-group discussions in a confidential, comfortable atmosphere. The group meets at 7 p.m. Mondays at First Presbyterian Church, 9325 Presbyterian Circle. An orientation for new members is offered at 6:30 p.m. Information: changingfocus.org.

Chair yoga The East Columbia 50+ Center at the East Columbia branch of the Howard County Library, 6600 Cradlerock Way, offers chair yoga, an introduction to yoga aimed at easing the pain of arthritis, reducing fatigue and improving circulation and breathing, at 9:30 a.m. Tuesdays. Reservations: 410-313-7680.

Also at the 50+ Center

•Age Well Exercise classes with Joyce DiTomaso will be held at 10 a.m. Tuesdays and Thursdays. Cost for an eight-week session is $35.

•A belly dance class will be held at 1 p.m. Tuesdays. Learn hip movements, stretches, arm and hand techniques, and veil dancing. The first class is free, then a monthly fee is due.

•A yoga class will be offered at 11 a.m. Mondays and 2 p.m. Tuesdays. Cost is $24 per month.

•A chess club for novice and veteran players meets at 1 p.m. Thursdays. Free.

•View newly released DVD movies on a big screen at 7 p.m. Thursdays. Free.

Singles social group

The Phoenix Cultural Singles Group, a Columbia social group for those 50 and older, meets from 11:45 a.m. to 1:15 p.m. Sundays at the Oakland Mills Interfaith Center, 5885 Robert Oliver Place in the Oakland Mills Village Center. Coffee, tea and a light snack are served. The group plans events and trips. Information: 410-997-0739.