The new and popular thing for niche communities to do is start a themed discord server!
For those of you who are unfamiliar, Discord is very similar to ye-olde IRC channels, but with a modern coat of paint. using the link below, you can join the ACKs discord server I created, which so far has a couple of themed channels for discussing things in real time (rather than by post). You can access discord just via a webpage, but there's also a desktop app and a phone app, depending on how plugged in you like to be.
The link below is good for 25 uses. If there's sufficient interest, I can generate another, and along the way I'll probably empower some of our regulars here on the forums to be able to do the same.