RCGroups does indeed have a live chat feature, at least for the moment. The chat has been around for over a decade now, and I've been moderating it for the past 8(?) or so years. The last of RCG's volunteer staff/mods/whatever.
There used to be a box on the main page, but it was removed a few years back, presumably to make room for ads (gotta pay the bills). We still have a core group of 20+ regulars who are happy to answer questions and help out in any way they can. We wont all be talking at once, since we are spread out pretty wide geographically, but generally if you join and say hi, someone will respond no matter what time of day or night.
There is a small text link at the very bottom of the RCG site that leads here:
And there is the Chat101 thread with some helpful information about the chat feature:
Everyone is welcome to stop in, whether it be for a quick 5 minute "help I broke something" or getting a dedicated IRC client and idling 24/7 with the rest of the regulars.
There has been mention of the chat feature being discontinued, but no date has been set as far as I'm aware, so we're going strong until then. When that happens, I've setup a backup server on my personal VPS that anyone is welcome to visit. I will update the Chat101 thread with that info as needed.
As for an FPV specific room, if you join the main channel (link above), FPV talk is more than welcome, and many of our regulars have FPV rigs of their own.
Feel free to stop in and say hi.
Join me at RCGroups Chat!