For the posters that are BORED and need "new forums" to post on.
Try one of these, it would take you weeks or months to get through them.
Something for many people.

https://it-maniacs.com/best-and-most-popular-forums-message-boards-and-online-communities-top-30/

Out of all the sites on that link, the only one I'm actually on is the IGNBoards. Discord is more of a chatroom than it is a forum.

Ya not many sites like this listed....

I dont even see city-data there :D