MARY-Kate Olsen was spotted last week locking lips and legs with a “scruffy” guy at a dinner at Club Le Baron in Paris for Greenhouse, the first-ever green nightclub made from recycled materials that’s set to open here on Tenth Avenue in December. The tall fellow pushed the pint-sized twin up against the wall and furiously made out with her to applause from the crowd. Olsen and her man even got a standing ovation from her table when she wrapped her legs around the guy.