Unmoved by a petition signed by over 4,500 people, an Upper West Side landlord has refused to renew the lease on the 66-year-old P&G bar, whose iconic sign is familiar to many from cameos on Seinfeld (and its ideal proximity to the Beacon Theatre). So Steve Chahalis, the fourth-generation owner of the bar, located at Amsterdam Avenue and 73rd Street, has decided to relocate a few blocks away. He's putting on a brave face, and......