“Detachment” star Adrien Brody was spotted having dinner with stunning brunette bag designer Rocio Olbes at STK Midtown on Saturday. Witnesses said Brody and Olbes dined in the private room with many from the cast and crew from the movie “The Bourne Legacy,” which opens in August. Our spy said, “Adrien had dinner with Rocio and others from the ‘Bourne Legacy,’ then they all went out. He and Rocio left shortly after, while others stayed to party.”