Olsen twins' double night

MARY-Kate and Ashley Olsen had an awesome double date the other night. Mary-Kate and her artist boyfriend, Nate Lowman, were spotted at Strip House with Ashley and her man, Justin Bartha. They were celebrating Bartha's birthday and ended the night at the Jane Hotel, where "Mary-Kate and Nate were making out and tickling each other like 5-year-olds," said our spy. The source said the couples ended the night on the hotel's private balcony "chain-smoking cigarettes until after 4 a.m."

(Edit:Ruby)