(Julie Jacobson | Associated Press file photo) In this March 20, 2013, file photo, Culinary Union workers demonstrate along Las Vegas Boulevard outside the Cosmopolitan Hotel and Casino while protesting their contract negotiations with Deutsche Bank in Las Vegas. The union representing thousands of Las Vegas casino workers estimates that the two largest resort operators would lose more than $10 million a day combined if housekeepers, cooks and others go on strike at any time starting Friday, June 1, 2018.