The U.S. Labor Department has sued Tobin Hill pizza spot Barbaro, accusing it of violating federal labor laws by making tipped workers give a share of their gratuities to managers. The suit, filed Sept. 1 in San Antonio federal court, argues that Pizza Bar LLC, which does business as Barbaro, also unlawfully shorted 25 current and ex-employees on their federally mandated overtime pay over a three-year time period. Restaurateur Chad Carey, whose Empty Stomach Group includes Pizza Bar, denied the allegations in a statement emailed to the Current.