has anybody ever been to this?

Myself and my good lady went down to Kentish Town today to pick up some basil and ice cream (!) and there were very many pissed, antagonistic Australians pouring out of the Forum, eating chicken, fighting, and lots of Security trying to keep them out of local pubs. I have seen them before and assume this is some kind of afternoon club at the Forum. Why are they all Aussie?