The opening of a Cheesecake Factory usually portends a rise in business in nearby restaurants, say my friends in commercial real estate. The thinking is that Cheesecake goes where the retail action is, and actually becomes a destination itself. In effect, the thinking goes, Cheesecake creates its own overflow. Let's go to Willow Grove, where Cheesecake opened in Willow Grove Park on Sept. 20. The mall's T.G.I. Friday's seemed crowded over the holiday season, as did the Olive Garden across Easton Road. But nothing helped the Romano's Macaroni Grill location across Moreland Road. It recently closed.