Leslie Dangel Roosevelt, of Boston and Tisbury, died of a fatal heart attack while swimming in Anguilla on Wednesday, March 23. She had just turned 64. She had been a familiar seasonal face on the Vineyard for many years, from the Chappaquiddick Beach Club and Edgartown Yacht Club (of which she and her husband, Tweed, were members) to the Island’s north shore beaches. She was, as family friend Paul McDonough described her, “the ultimate Vineyard Pisces.”

Leslie was born in Boston on March 10, 1947, daughter of Shirley Fur (nee Goldsmith) and Ben Levin. She attended Mamaroneck High School and Connecticut College (class of 1968). After college, she moved out to San Francisco for three years. “She owned a car that barely made it up Russian Hill and one-sixth of a 10-man tent, and that’s all she needed,” recalled her first husband. Coming full circle, in recent years she served on the board of the Somerville Homeless Coalition.

While in San Francisco, Leslie worked at Botsford, Ketcham, the top advertising agency in the city, where she was noted for selling psychedelic ties from a rack on her desk. She enjoyed a long career as a marketing executive in various businesses. She was head of marketing at Merrimack College and taught marketing at several colleges.

In 1971, Leslie returned to Boston to marry Edward T. Dangel 3rd, with whom she had two children, Justin (36) and Julianna (33). They divorced in 1984. In 1999 she met and fell in love with Tweed Roosevelt, whom she married three years ago.

Leslie was an avid swimmer, sailor and all-around nature lover. She was gifted at combining her delight in the outdoors with her other great love: the company of friends and family. She loved parties, picnics, holiday meals — almost any gathering felt like a celebration when Leslie was a part of it. Joan-Ellen Pichard met Leslie sailboat racing in 1984 and recalls the group who raced together becoming the closest of friends.

Leslie had a natural gift for creating such bonds. She was outgoing, funny, smart and irrepressibly upbeat. Her cousin Jeremy Berlin remembered: “Even under trying circumstances, Leslie always had the capacity to bring humor and relaxation to the table.” Sometimes that table was enormous. For example, Tweed’s family had a remarkable tradition on Northern Pines Road — Thanksgiving consisted of a large and unconventional collection of loved ones, with people coming from as far away as Mongolia, and including such extended family as Tweed and Leslie’s ex-spouses and their new partners. For the past decade, Leslie presided over this annual feast.

She loved everyone and everyone loved her — and not just people. Neighbors all over the Northern Pines area off Lambert’s Cove Road were accustomed to seeing her power-walking with a dog beside her — sometimes her mother in law’s bichon frise, Muffin, and later a Portuguese water dog named Leuco (owned by Nicole Galland, Tweed and Leslie’s tenant), who worshipped Leslie. They made a kind of a matched set — short, energetic, chipper, with thick hair ruffled by the wind and sea — on their daily afternoon excursions toward Chip Chop.

“She was constantly in motion,” said Mr. McDonough. “Power-walking, playing tennis, sailing, kayaking, swimming. She was quick to laugh and always surrounded herself with friends and family. Her love for the kids and for Tweed was boundless.”

Her husband Tweed offered what might be the pinnacle of spousal appreciation: “She knew how to help me become a much better person. She civilized me. She was marvelous.”

Leslie’s lust for life began at an early age. At 17 she was diagnosed with Hodgkin’s lymphoma, and was one of the first patients ever to be successfully treated with radiation for it. Her daughter Julie feels that Leslie’s fearlessness and gregariousness sprang from her surviving that experience: “She felt she got a second chance at life. She got an extra 47 years.” She filled those years with joyful exuberance for nearly everything she ever did. Joan-Ellen, recalling a recent conversation with Leslie, quoted Leslie’s assessment of her own life: “Whether we die now or we die in a rocking chair, we’ll have no regrets — we did what we wanted to do, we did it all.”

Leslie is survived by her husband, Tweed Roosevelt; her children, Justin Edward Dangel of Boston and Julianna Dangel Milberg and son in law Michael Milberg, of Los Angeles; her stepchildren Winthrop Cole Roosevelt and Amanda Carew Roosevelt, both of Boston; and brother, Robert Levin, of Boston.

Her funeral service is today, Friday, April 8 at 11 a.m. It will be at the Levine Chapel, 470 Harvard street in Brookline. She will be cremated; some of her ashes will be interred in Tweed’s family plot, in Young’s Cemetery, Oyster Bay, New York; some of her ashes will be spread in other places of special meaning to her and her family.

In lieu of flowers, donations should be made to the Friends of the Edgartown Library, P.O. Box 5249, Edgartown, MA 02539. In addition to today’s ceremony, there are plans for a celebration of her life sometime this summer on the Vineyard.