As if by magic — though in reality it took an indomitable spirit, tireless cajoling, and a deep belief in music’s universal value — Ruth Widder routinely transformed the folding chairs and wooden bleachers of the Montauk School gymnasium into Lincoln Center for over two decades and counting.
Ms. Widder died at her Manhattan residence on Feb. 20. She was 84. The cause of death is not known; except for a cold the week before, she had not been ill. A memorial service was held yesterday at the Riverside Memorial Chapel in Manhattan.