A former Chicago Athletic Association employee said in a recent federal lawsuit he and others were stiffed on overtime pay and tips by Hyatt Hotels. The former employee also alleged racial discrimination while he worked at the downtown Chicago hotel and venue, saying in the suit he was demoted “simply because of his race.” The lawsuit was filed in U.S. District Court in Chicago by former employee Darren Sanders against Chicago-based Hyatt Hotels and related companies, which operate the Chicago Athletic Association. Sanders is seeking class-action status, alleging that a range of employees were…