Mark Pincus' cheap dateMark Pincus let a friend pick up a huge tab at Nobu the week he offloaded the assets of Tribe, the social network, to Cisco. What could be cheaper than that? The twitchy serial entrepreneur, who's dating his way around Manhattan, Aspen and Burning Man, recently met Cameron Diaz in Monterey. The Hollywood star, pictured here on Pincus' blog posing gamely by the bar, paid for the drinks.