Tai Chi for free in Paris

Paris could be a stressfull city: the metro, the people, the pollution so why not trying a martial art, known for promoting health and longevity:Tai Chi Chuan.
Their training forms are well known as the slow motion routines that groups of people practice together every morning in parks around the world. And guess what, we have it here in Paris!
If course these classes are free. Go to Buttes Chaumont (metro station: Laumiere) at 9am. Vietnamese Master Thoi conducts a one-hour class and anyone can join.
This class is one of the things you can do for free in Paris. So why should we avoid it, hu?!

Thanks to Candlemaker for the photo.