Gregory's Server
And for those who don't know what it is, Smithereen is a "Federated, ActivityPub-compatible social network server with friends, walls, and groups."
It looks like groups are implemented similar to platforms like friendica where there's a "user" that people post at that will then distribute the posts they're sent to any followers.
It looks like groups are implemented similar to platforms like friendica where there's a "user" that people post at that will then distribute the posts they're sent to any followers.