"People of the same trade seldom meet together, even for merriment and diversion, but the conversation ends in a conspiracy against the public, or in some contrivance to raise prices." - Adam Smith, The Wealth Of Nations
I can think of no sane reason for the guy to Mark Zuckerberg's left to bring all of these people together.
You might not be familiar with John Doerr, of Kleiner-Perkins. He heads up the venture capital firm that's behind Al Gore's quest to make the government (and you) purchase a lot of unnecessary crap that's painted green. Steve Westly, the guy with his back to you, is in charge of an outfit called The Westly Group, another clean energy venture capital firm. Before that he was Chief Financial Officer Of The State Of California.
God knows what this dinner will wind up costing taxpayers.