Rubin started to play competitive bridge when he was in high school, and in his 30s became a full-time player, which he was able to pursue because of his wife's income from her occupation in speech pathology. Known as "the Beast" for his intense style of playing, he invented several bidding systems in the game of bridge. He won 23 contract bridge titles including the Bermuda Bowl in 1976. In 2000, he was inducted into the American Contract Bridge League Hall of Fame.
Rubin died, aged 82, survived by three children and four grandchildren. He is buried at Mount Moriah Cemetery (Fairview, New Jersey).