This is somehow something ritual. Many people go into a room. The doors are closed and something is happen. The ritual starts. After that ritual doors are open again, the people left and have transformed into something new, altered their minds apart from everyday experience. An indicator for the degree of change seems to be the next day: when you awake and cannot believe the things that happened the day before.

I am not sure how the things are that have to happen inside the room to transform mind. (Maybe make some more research on this, so comments appreciated.) But it is for sure, that this setting of a “closed room” has the potential to make this dynamic action possible. An open room has to much affects on mind to leave or to disperse thoughts and feelings. A closed room also means that you feel unattended. You can go outside yourself and if everybody does the same, then all are “sharing a secret”. That secret is the ritualistic action itself. In this setting everyting can happen that is apart from the ordinary. Here is the mind-transforming potential. This ritualistic events are often combined with music. Maybe there is also a higher sense for non-spoken communication and pre-decided or unconcious behaviour.

Some examples are: clubs (in opposition to discotheque), Mass (at churchhouse), maybe cinema and even swinger-clubs.