- Members of the 12-step program, Alcoholics Anonymous (1942)
- Music for the Movements, George Gurdjieff (1919)
- Human Potential Movement, Paul Bindrim, a nude encounter group therapy session at the Esalen Institute, Big Sur, California (1968)
- Girl Scouts of the Philippines (2014)
- Head of Mind Control, Jack Gariss leading a group session connected via bioscope machines (1960s)
- Organized crime in Australia, mug shot (1921)
- Training for the Soviet Air Army (1965)
- Alexander Lowen, MD, Bio-energetic group workshop (1980)
- 900-member mass suicide, The People’s Temple cult led by Reverend Jim Jones, Jonestown, Guyana (1978)
- Journey into Self, a group therapy session with Dr. Carl Rogers (1967)
- Encounter group therapy Big Sur, California (1968)