SAY CHEESE: Elie Tahari celebrated the launch of his eyewear collection with a bit of buzzy marketing: “Selfies with Elie.” The event, held at Bloomingdale’s New York flagship, invited shoppers to try on the designer’s sunglasses and pose in an open-air photo booth with the designer. Photos could then be e-mailed, or uploaded directly to Facebook and Twitter. When not posing for a photo, the designer socialized with the crowd, approving certain looks or offering tips on optimal styles. “It’s too big for you,” he told one guest. “Try something smaller. A cat-eye.” The eyewear collection made its debut in stores just over a month ago. “This is what we work for,” said Tahari, as he surveyed the crowded third floor. “It’s exciting to see customers in the glasses and the clothes.” Earlier in the evening, Tahari had popped into the dressing room to properly give head-to-toe styling tips.