Started by an Indian physician in Mumbai, India in 1995, the Laughter yoga movement has since grown to over 6,000 Laughter Clubs in more than 55 Countries. Combining Yogic Breathing & Asana with socially interactive laughter explorations, a sense of childlike play is cultivated, and is of great benefit both physically and psychologically. By coming together to laugh, we are able to transcend normal social barriers, encourage one another so as to reap the many benefits, and experience the simple joy that connects us all. No yoga experience necessary, run tell a friend to tell a friend, come one come all, All as One, let's harvest our joy together.

http://en.wikipedia.org/wiki/Laughter_Yoga