Melanie Griffith called Serendipity 3 on her way to the airport and picked up a couple of foot-long hot dogs to go. Griffith, in boots, camel-colored pants and a suede coat, sashayed in the other day to grab her order as her driver waited outside. She also picked up a bottle of the restaurant’s perfume, Serendipitous, for her 15-year-old daughter, Stella. “She was told it was sold out. [Melanie] pleaded with the clerk to sell her the tester,” a spy said. “She happily obliged.”