Wikipedia
The Synanon organization, initially a drug rehabilitation program, was founded by Charles E. "Chuck" Dederich, Sr., (1913–1997) in 1958 in Santa Monica, California, United States. By the early 1960s, Synanon had also become an alternative community, attracting people with its emphasis on living a self-examined life, as aided by group truth-telling sessions that came to be known as the "Synanon Game." Synanon ultimately became the Church of Synanon in the 1970s, and disbanded permanently in 1991 due to many criminal activities, including attempted murder of which members were convicted, and legal problems, including losing its tax free status retroactively with the Internal Revenue Service due to financial misdeeds, destruction of evidence and terrorism. It has been called one of the "most dangerous and violent cults America had ever seen."
Synanon is a 1965 film directed by Richard Quine. It stars Edmond O'Brien, Stella Stevens, Eartha Kitt, Alex Cord and Chuck Connors. It was filmed at Synanon in Santa Monica, California.