Luis Duarte hosts Tai Chi classes at First Congregational Church of Greenwich on Weds at 8am and Thursdays at 9am. For those of you who don't know where the Church is, its at 191 Sound Beach Avenue in Old Greenwich.Ok, I just spent the last 20 minutes looking through different Greenwich websites to figure out what I could post as the next thing to do in Greenwich when I came upon this. I know nothing of Tai Chi and even less of Luis Duarte, but this class is costs only $7 per session (if you pay monthly) and $8 per session if you pay when you come. For that cost I figured it might be worth experimenting. Having looked into all sorts of work-out classes and events spending $7 is a steal.