not really about the content of the sessions. Or anything you take from it. The most important thing are the relationships, the connections you gain from sharing the things you're passionate about with the people who are interested in it, the momentum you build from working on your project in preparation for a session
I somewhat disagree - I think this community building is successful precisely because there is a shared interest or goal. It goes hand in hand. If there is no connecting theme or goal, the groups fall apart.