A thread of the original Catfish Corner’s Southern legacy continues on at this prime Central District corner via fried chicken atop old-fashioned thin waffles, the kind with tiny squares. Chef Patrick Dours coaxes heroic amounts of personality from boneless, skinless chicken breasts. Seasoning is sufficient for grown-ups and mellow enough for the many (many) kids in the room. Replacing a neighborhood landmark is a tricky business, but at Fat’s you can eat well for $15, and service is incredibly hospitable: promising signs of a new neighborhood institution.