It's closing time for the Fifth Quarter nightclub in downtown Ann Arbor. The troubled establishment at 210 S. Fifth Ave. officially has shuttered its doors after a string of problems. Fights, assaults by staff and incidents of over-serving customers prompted Ann Arbor officials to ask owners and management to stem the problems last year. With calls for police service as of late October running at twice the number recorded in all of 2009, Ann Arbor officials filed a lawsuit in November against the business and the owners of the building that houses it. A college student from Livonia also recently filed a lawsuit saying that at least two bouncers at the club severely beat and choked him last year, then threw him out on the street while he was unconscious. The owner of the building today confirmed he's throwing in the towel and closing the nightclub and selling it to a new owner. Read the story here.