All other issues aside you (I'm not going to touch that with a ten foot pole) you get what you pay for. It you want some guarantee of quality or recourse if you don't like it, pay for the class. This poor guy was teaching a free class at a park, in the manner he chose. Rather than looking at it as a waste of your time, why don't you consider paying a tai chi instructor and asking them ahead of time about their class progression and style of teaching?
Beggars can't be choosers - I'd see a lot more impetus to whine if this wasn't a free class by a *volunteer* tai chi enthusiast, who clearly loves the subject for its spiritual as well as physical aspects.
Last edited by Arctic Mama; 05-15-2014 at 04:07 PM.