Thanks to the the amazing work of the #ngi-pointer team there is now a Rooms V2. You can find all info about that in @andrestaltz's post %qEzQaWh....
I was able to pop up a brand new Room server using the easy instructions provided on https://github.com/ssb-ngi-pointer/go-ssb-roo (I'm not using sub-sub domains though, so that won't work on my server).
For now the sign-up is open. As soon as we achieve critical mass I'll make it "community".
So go sign up while the invites last!