Large-group awareness training
The term large-group awareness training (LGAT) refers to activities—usually offered by groups with links to the human potential movement—which claim to increase self-awareness and to bring about desirable transformations in individuals' personal lives. LGATs are unconventional; they often take place over several days, and may compromise participants' mental wellbeing.
Source: Wikipedia — Large-group awareness training (CC BY-SA 4.0)