Dave.... are you really offering legal advice, and then a paragraph later advising me to charge people to teach them how to break the law with sex, drugs, and fire (depending on where you're performing)? ...

Fantastic. You made my morning.
Seriously, It's not a bad idea. But when are you honestly going to find the time?
Also, in my experience, if anyone wants to learn a few tricks, they just ask on an as needed basis.
For example, I've been offering free poi lessons to everyone for several years. Though, I only need one hand to count how many have taken me up on it. I've taught (and charged) total strangers waaay more often than I ever get to teach a friend, which I'd prefer. I've tried to get a bi-weekly or monthly class together, but there just isn't enough interest, that I can find.