juraj on Nostr: Best way to keep and be able to discover list of people for example from the various ...

Best way to keep and be able to discover list of people for example from the various TwentyOne (Dvadsaťjeden) groups?

should we create a Nostr key to manage the group in each city and keep a list under that key? What service to use?

I would like the list to be easily usable (one click follow all, or manually follow each) and as client agnostic as possible.

I realize we have a bootstrapping problem. When we go to a Bitcoin meetup together, I want to keep in touch with the whole community.

How to make it as simple as possible for everyone?