Me and my friends have a unofficial community Discord server for Haiku, that we recently reorganized and cleaned up.
From what I have seen, a lot of people could care less about something like this. Yes, I know that IRC and other better methods of communication exist.
For those of you who do care, you can check it out here: https://discord.gg/5FDhmM4
It currently has 45 members in it, though most of them are inactive.