Cameron Diaz enjoyed a girls’ night out at the Jade Hotel in Greenwich Village on Saturday night. The actress, who is in town filming “The Other Woman” relaxed with three girlfriends in the back bar. A witness said, “The bar area was so crowded, but Cameron and her friends sat right in front of the middle of the bar and joked around with the bartender . . . Most people were dressed up, but she was in a T-shirt and jeans, wearing flats with her hair up.” The spy added, “As she was walking out she graciously spoke to a guy who was trying to flirt with her. She hung out in the lobby with him for a bit and then left.”