 During his retirement years, he co-owned a restaurant in Hempstead, N.Y. and also staged, produced and performed in plays at two theaters that he owned, "The Tinkerpond Playhouse" in Syosset, N.Y. and The Montauk Point Playhouse.Sheldon also worked with many charities, most notably "The United Cerebrial Palsy Telethons" with Jane Pickens Hoving, Dennis James and Steve Lawrence and Eydie Gorme".He succumbed to a massive heart attack on July 21, 1964 at age 51.