Congresswoman Nancy Pelosi recently spent her lunch break touring the new outpost of mobile eateries in SF on Folsom and Second Streets as part of a renewed effort to explore San Francisco’s onslaught of small businesses. Guided by Off The Grid founder Matt Cohen, Pelosi sampled the wares of some of the city’s newest sect of entrepreneurs, learning about the special ingredients in the Phat Thai’s famous pad thai and how the Doc’s staff keeps customers on their toes with a lively Twitter account.