Chiang Mai Sepak takraw.
I found a guest house in Chiang Mai called the Royal Guest House. It is anything but royal but who is complaining for five bucks a night. They have a swimming pool so I might try that when it gets a bit hot.
I stopped at the park and watched some guys playing Se Puk Tra Gor, which is like volleyball except you play with your feet and head and kick a rattan ball. Well it is actually plastic I think. But originally it was made from rattan. They also play it in Malaysia, but I do not know where else they play it. It seems that it is played throughout South-east Asia and the Philippines.
One guy throws the ball to the server, who kicks it over the net and the other side has to return it. I have a feeling that the rules are exactly like volleyball but you cannot touch the ball with your hands.