

Yes, forum was and is a good term because it also conveys the roots of democracy in ancient times (a physical place where people met to discuss things of common interest). That was precisely the point a few decades ago: to distinguish between interactive communication media and mass media, which were characterized by one-way communication from a central sender to many recipients.
Unfortunately, however, forum is now a term that sounds outdated because it is associated with the internet before Facebook (2004) – and I would classify Facebook today as a mass medium rather than a social medium, even though, unlike classical publishing media (newspapers and so on), it does not produce any content itself.
These things are called “Dübel,” which is also a casual term for joint in German, and can also be used as a verb: “einen dübeln” means to smoke a joint — all things that help humanity progress.