OP is probably looking for something similar to Telegram or Discord(I could be wrong though). but if OP is also looking for a forum, this one is pretty active.
Probably OP can be looking for groups on social online places like Telegram but this forum can be enough for some discussions. But if it is about betting predictions, he will need a group for that on Telegram. I have a friend that told me that they are many in Telegram that talks about odds and the matches that can be good but I was not interested. Everything that I discuss about gambling is not beyond this forum.