Potbelly creates #FeedYourSmile to celebrate 40th anniversary

In celebration of its 40th anniversary, Potbelly, the sandwich shop which originated in Chicago, has turned to Detroit-based ad agency, Doner, to create a social media campaign called #FeedYourSmile. Throughout the month of June, the campaign will be released in two parts.For the 'Twitter jamboree' Doner brought improv musicians to a Potbelly in Detroit where they improvised original songs Thursday (June 1) as a response to 100 tweets from random unhappy people. They used third-party A