It sounds like you're having a good time edifying others. Reminding them about Mr. Newton is a great idea.
If you decide to do more workshops, you might provide a teaser, like a short, sparky presentation--enough to get folks to come back for details/explanations. Again, though, as someone else said, know your audience.
I wonder if there would be interest on my campus...or in my sustainability society for actual workshops. I did a presentation geared towards college students for last Earth Day...
HERE. I gave the presentation in the student center, and caught the eye of several students.
Oh, there is also a thread started about giving FE
presentations if it would add inspiration for anyone.