Uptown, more social fixtures, from Renée Rockefeller to Gigi Mortimer, gathered at the Valentino boutique for a luncheon to honor Princess Marie-Chantal of Greece. The cover girl of November's issue of House & Garden (and clad in a couture Valentino gown), the princess was making the rounds in Manhattan, catching up with old friends and mixing business with pleasure. "I should do this more often," she said with a laugh of posing for magazines and getting to jet to New York to do press. The previous day, she invited pals and their little ones to her Madison Avenue boutique for "an afternoon of shopping, face-painting and treats." Alex Kramer, Valesca Guerrand-Hermès and Samantha Boardman perused the boutique while a bevy of kids stood in line for face-painting and snacked on Eleni's animal cookies. All in a day's work.