Pawtucket Mayor Donald R. Grebien, left, interviews city restaurateurs Jack Doherty, who recently opened Sullivan’s Publick House, and Brandon Harnois, right, general manager of Cresta Bar & Ristorante, for the mayor’s weekly radio show. “The Mayor’s Corner” airs for 30 minutes on Monday mornings on station WBZS 550-AM. The radio show is part of a broader effort by the mayor to reach out to local businesses and city groups. The weekly show began airing Jan. 2.