What is being described here happens in churches and other religions every Sunday. In some churches people get up and sing and dance or talk in tongue. Adolescent worship also pray in groups and do the things described here, but no complaints about that? These groups you speak about are just copying religion, but putting it in a secular framework. Think of it as religion for atheists or people who don't like religions for whatever reason, but still want the same emotions involved with the service. It's easy to make fun of these people and say look it's addictive, the come back every week and even pay for it by donating money. If it didn't give people what they needed they wouldn't go, so obviously it is doing something positive for people. This group dynamic is present in many different scenarios, but for some reason when applied for self improvement or treatment programs it suddenly is some evil tactic, more double standard from this forum.