I'm in a different town on a conference with people I half know. And as I want to tell them something I now realize that we do not have a group chat. I've been so used to group chats on this type of thing and now there just isn't one. I feel like they are likely to suggest Facebook if I asked about it though, so I probably won't.
In a decentralised social media it makes sense to host yourself. That's what we decided to do. This instance is run by two nerds, mostly for the why not of it. Feel free to join, and we'll hit you up with an "Hi, who are you?".