There’s not much in the name of community Discords and such beyond neutral ones and the one Zaphius has just mentioned, to my knowledge. Besides that, there are two active Forsaken guilds that I know of.
Beyond these two guilds, keep in mind that you do not need to roleplay your Forsaken character in some dedicated area where you can only interact with other Forsaken. Your character is a part of the Horde, and you can interact with anyone in the Horde in any Horde city or town, or even the other faction in neutral cities and towns.
A public event for the Horde I’m personally waiting for is this one, if you want to take a peek. As I’ve said, all Horde allowed.
Also, it’s less about using the pejorative synonym for a ‘group’ and more like fantasy RPGs have had DMs and groups since Chris Metzen was a newborn. There’s no shame in people being in a guild to roleplay together, and I can assure you that they won’t turn your nose up at you and not roleplay with you if you approach them for some roleplay.