Here’s the first message I sent to the social group I decided to launch from. Feel free to adapt it for your own use. Short and sweet is better!
Subject: Get together for online course?
You probably know about the great variety of free or inexpensive online courses at Coursera and similar websites. I’ve completed a few, but I miss the exchange of ideas and personal interaction of a live classroom. So, I’d like to organize a group where we take an online course together and gather once a week to compare notes, ask questions, and motivate each other. What do you think?
If you’re interested in picking a course together, please send me an email (firstname.lastname@example.org), and in a week I’ll take the next steps: set up an email list where we can learn about our interests and look for courses at Coursera, edX, Udemy, or your own favorite, and set up a meeting at the library or Community Center if there’s demand.
[my street name]