But actually, there is already this feature on Steam. Each game has an official group chat, which looks like this.
In order to access it, all you need to do is:
- Go to http://steamcommunity.com/app/396900, and subscribe to GRIP
- In steam friends window, go to the GROUP tab, then in GRIP
- Once you're there, be sure to check "Beep when users send message" or you won't hear anything
As long as Multiplayer is a Private feature, we could use that to organize races when we're available