Fast Company: You're across from the playground where Jack Dorsey first articulated the idea that would become Twitter (a 2011 Most Innovative Company). His goal? To better organize his nighttime plans.
Fast Company: Employees at Zynga (#9 on 2011's list of Most Innovative Companies), which has developed such social games as Mafia Wars and FarmVille, love snacking on tater tots at this Portrero Hill dive bar.