For any range of topics, lighthearted to serious, hobbies and games to helping and engaging with community matters. Regarding reach, I mean what ways may be used alongside word of mouth, as I honestly don’t hear people talk about groups they’re in (besides sports/bands) all that much.
offline groups will be monitored, it will take the state, or state friendly associates, manpower to provide that level of surveillance, but as we saw in the soviet union, when there’s no hope, and nothing else to strive for, watching your neighbor becomes entertainment and employment. i’m not saying do nothing and stay home in the dark, i’m just saying be very aware of the universe we are all going to find ourselves living in a year from now.