Charlotte Ronson was joined by family and friends for dinner at the new Dakota Bridge at the Hollywood Roosevelt Hotel in L.A. last night to celebrate her Fall '08 collection. In what has become a seasonal West Coast jaunt, Ronson, clad in an aqua button-front jumper with cutout detailing from her summer line, was busy catching up her young Hollywood clientele (among them, Nicole Richie and Lindsay Lohan, who was wearing a short-sleeved black-and-white print top from the line). But for a designer known primarily for cutesy rompers and feminine cotton separates, the new collection is taking a decidedly more grown-up tone. "As I grow up, the collections keep evolving, becoming more sophisticated," she said, pointing out her abundant use of black in the Fall pieces. "It's fun to watch them growing as I grow."