We're not sure what motivates venture capitalists to engage in such humiliating spectacle. Ours is not to reason why a group of folks with billions at their disposal must sing a cappella to party guests. Not sure who this magical duo is (help?), but the gig went down last November at the home of Sequoia's Pierre Lamond, as recorded by Roelof Botha. If the above isn't to your taste (despite bonus flash of Youtubers Chad Hurley and Steve Chen, consider "Blue Moon," "Forever & Ever Amen," "Mambo #5," or "So Happy Together."
UPDATE: It appears Roelof Botha took all his clips private, sad to say.