Drunk dudes whizzing on trees, a couple shots before the meeting, "strap on some plums" t-shirts. Apparently even Y-Combinator can't escape the inevitable consequence of nerds turning into frat boys as soon as they get a little money...
From what I've read on his blog, it seems like Matt was never really a nerd to start with. His startup seems to be involved with sports somehow from what I can gather?
I've said it earlier and I'll say it again - not all hackers and tech entrepreneurs are 'nerds' by the stereotypical definition.
Putting together comments from Matt's blog and the Demo day article from Fred Wilson (?), I think they must be the ones doing fantasy sports betting. Also fits with Matt's background.
