The Club Cat
I think that’s largely because starting a thread on the forum feels relatively formal, and if everyone started threads to say ‘I’ll be slacklining outside the PEC from 4 today.’, or ‘Pub tonight, anyone?’, etc. the forum would get ridiculously cluttered.
On the other hand, if we start a more casual page, say on FB, the forum will likely fall by the wayside again.
I have no solution, but those are the main issues, as I see them.