Support groups for sure, but I was more thinking of things like sporting clubs, dog parks, skate parks, artistic communities, soup kitchens, men’s sheds, book clubs. Third spaces.
Anything where participation is voluntary, hierarchy is absent or minimal, and people come together to share interests, resources, time, or company.
Rules and leaders don’t have to be harmful or coercive though. Even very egalitarian communities need norms. Hell even an anarchosyndicalist commune will have some shared set of expectations of its members.
Like you said, cults are about control. I have a hard time seeing much of a parallel between the necessary structure and norms of a community or club, and the coercive nature of a cult.