Prenatal Yoga, 6:30 to 7:30 p.m., YMCA of Martha's Vineyard. Free for expectant mothers. Call 508-696-7171 or visit ymcamv.org.
West Tisbury Farmers' Market is from 9 a.m. to noon at the Grange Hall in West Tisbury. Local produce, flowers and live music.
Cancer Support Group meets every Wednesday at noon in the library of the Hebrew Center in Vineyard Haven. Caring peer support for those in treatment, as well as for survivors and caregivers.
Martha's Vineyard Toastmasters, 7 to 8:30 p.m., Vineyard Haven Legion Hall. Nonprofit educational organization that teaches public speaking and leadership skills. Call 413-237-6337.
Sunset Stories and snacks on the library lawn, 7 p.m., Edgartown library. Call 508-627-4221 or visit edgartownlibrary.org.
Grounds Volunteer Day, 9 a.m. to noon, Polly Hill Arboretum, West Tisbury. First Thursday of the month through October. Learn about the grounds and tree maintenance program.
Outdoor Yoga for Kids, 4 p.m., with Sondra Murphy, Oak Bluffs library. Drop-in class for ages 4 and up. Cancelled if raining. Bring a mat or towel.
Friday Ceramics for Children ages 7 to 12, with Nancy Blank, 2 to 4 p.m., Featherstone Center for the Arts. $30.
Lobster Rolls at Grace Episcopal Church, Woodlawn avenue and William street, Vineyard Haven. Every Friday, 4 to 7:30 p.m. Cost $17/roll. Phone ahead for large orders, more than six.