Who runs the most social restaurant chain? As part of a report that Ira Brodsky and I are working on, we examined the social media accounts of the top 100 restaurant chains and scored them based on engagement and popularity. Not surprisingly, Starbucks and Subway are social media superstars with millions of their customers engaged. Both are big on Facebook, Twitter, and YouTube. Starbucks is also big on channels that most competitors have barely touched: Instagram, Foursquare, Google+, and Pinterest. Honorable mention also goes to Jamba Juice and Hooters, who both have solid Tumbler, YouTube, Foursquare, and Twitter followings.