Laughter Yoga NYC

At first laughter yoga seemed confined to California. Okay. We know California is willing to try anything. But I just read about it in Montreal (see photo above, from the Montreal Gazette), and after a bit of searching, found a club in New York.

Here's what the New York site (www.grabbagiraffe.org) says about laughter yoga:

"The unique idea of laughter yoga clubs was discovered on 13th of March 1995 by Dr. Madan Kataria, a physician from Mumbai (India). Any one can laugh for 15-20 minutes without depending upon great sense of humor, jokes or comedy. It combines laughter exercises (simulated laughter) and yoga breathing, which turns into real laughter when practiced in a group."

I still don't know why it's yoga. Why is this yoga?