Widower’s support group Volunteers from the Patuxent Widowed Persons Service lead a support group for those who have recently lost a spouse. Thursday, 2-4 p.m. Residence on Greenbelt, 9885 Greenbelt Rd., Lanham. 301-577-4312. 301-345-3583. Free, registration required.

New Carrollton dance classes A weekly class to learn how to square and line dance. Sponsored by the Good Luck Squares, a program of the New Carrollton ReCouncil. Thursday, 7:15-8:30 p.m. Robert Frost Elementary School, 6419 85th Ave., New Carrollton. Virginia Fromel at 301-552-1576. $5.

Women’s open volleyball A non-competitive, drop-in game of volleyball for women age 18 and older. Friday, 11 a.m.-1:30 p.m. City of Bowie Gymnasium, 4100 Northview Dr., Bowie. $2, gym members free.

Arthritis Walk The community is invited to walk one lap, one mile, or five miles to benefit the Arthritis Foundation. Visit health booths, vendors, compete for prizes and more at the family-friendly event. Saturday, 9 a.m.-noon. Eleanor Roosevelt High School, 7601 Hanover Pkwy., Greenbelt, 301-335-7689, PGWalkComm@aol.com, www.arthritiswalk.org. Free, registration required.

Heartastic expo Women for Men Aiming Higher hosts this event to address cardiovascular disease through education, fitness, fun and free, healthy groceries. Saturday, 10 a.m. Prince George’s Sports and Learning Complex, 8001 Sheriff Rd., Landover. 240-281-5898. www.w4mah.org. Free, registration required.

Introduction to crystals Learn how to use crystals and gemstones for healing and well-being. Saturday, 11 a.m.-1 p.m. Avalaura’s Healing Center, 9196 Autoville Dr., College Park. 301-458-0335. www.avalaura.com. $45, registration required.

Terrapin Triathlon Swim, bike and run at the University of Maryland spring triathlon. Sunday, 6 a.m. University of Maryland, Department of Campus Recreation Services, Baltimore Avenue and Rossborough Lane, College Park. terrapintriathlon@gmail.com. www.crs.umd.edu/cms/Aquatics/TerrapinTriathlon.aspx. $55-$210, registration required.

Fit-n-fun cardio A high/low cardio workout with weights, Latin moves, boot-camp exercises and floor work set to fun music. For age 16 and older. Monday, 10-11:15 a.m. Greenbelt Community Center, 15 Crescent Rd. 301-397-2208. $4 per class. Registration requested.

SoulCollage grief support group A monthly support group sponsored by the Chesapeake Life Center. Monday, 5-7:30 p.m. Church of the Redeemer-Bowie, 7300 Race Track Rd., Bowie. Roberta Rook at 410-987-2129. rrook@chesapeakelifecenter.org. www.chesapeakelifecenter.org. $10, registration required. Hospice of Chesapeake members free.

Parkinson’s support group Tuesday, 10:30 a.m. Laurel Regional Hospital, 7300 Van Dusen Rd., Laurel. 301-497-8746.

Bowie mental health support group Sponsored by National Alliance on Mental Illness. Tuesday 6:30-8:30 p.m. South Bowie Library, 15301 Hall Rd., Bowie. Edward Bowles at 240-606-4352. ohhat2@msn.com. Free, registration required.

Waterfront yoga Guest instructors lead outdoor yoga sessions accompanied by live music. Bring a mat. Tuesday, 7-8 p.m. National Harbor, East Pier Platform, 150 National Plaza, National Harbor. 877-628-5427. www.nationalharbor.com. Free.

Diabetes education workshop Diabetes screenings; learn how to make lifestyle changes that minimize risks, and how to manage the disease. Wednesday, 10 a.m.-noon. Doctors Community Hospital, professional office building, first-floor conference room, 8100 Good Luck Rd., Lanham. 301-883-7828. Free, registration required.

Bariatric/weight loss surgery seminar A surgeon discusses the procedures and how they may help you. Sponsored by Providence Hospital. Wednesday, 6-8 p.m. St. Joseph’s Catholic Church, 2020 Saint Josephs Dr., Largo. 877-993-7422. www.providencebariatrics.com. Free, registration required.

— Compiled by Jillian S. Jarrett

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