1. The Jewish Family and Children's Service will host a seminar on aging in the LGBT community at 4 p.m.
2. A seminar on planning for retirement will be held at the Waltham Public Library today at 7 p.m.
3. A free yoga class will be held at 4:30 p.m. at 34 Alder St.
4. A weekly Zumba class will be held at 7 p.m. at 8 Common St.
5. Have some fun today!