Bloomingdale attended Brown University in Providence, Rhode Island,[2] where he was a member of the football team as well as Delta Kappa Epsilon fraternity (Upsilon chapter).

[2] To facilitate the need of his wealthy friends who liked to patronize New York City's upscale restaurants following a night at the theater, Bloomingdale launched a credit card business called "Dine and Sign" that meant people on a night out no longer needed to carry large sums of cash.

In 1951, he merged his company with Diners Club and joined the rapidly growing business as an executive, becoming chairman of the board of directors in 1964.

Morgan eventually moved into a condominium in the San Fernando Valley where she rented a room to a schizophrenic named Marvin Pancoast, whom she knew from the withdrawal clinic.

In 2017, actress Janis Paige wrote a guest column for The Hollywood Reporter in which she stated that Alfred Bloomingdale had attempted to rape her when she was 22 years old.