Così, based in Boston, Massachusetts, is an American fast-casual restaurant chain that is known for its homemade flatbread. The name comes from the opera Così fan tutte, which was a favorite of the original owner. As of November 2020, the company operated 20 locations in New York, Washington D.C., Virginia, Pennsylvania, Massachusetts, Connecticut, Illinois, Indiana, and Ohio, down from 66 at the beginning of the year. The chain filed for Chapter 11 bankruptcy in February 2020.