Psycho Success Club

The Psycho Success Club was a New York-based mail-order outfit, organised by Elmer Ellsworth Knowles (a.k.a. Elmer Sidney Prather), described in the advertising as the "most powerful mental organization the world has ever known," offering the "Mystic Formula" and "Harmony Key" as part of a course covering "hypnotism, mysteries of magic, astrology, clairvoyance, graphology, palmistry, and the black arts," to paying students.