In case you missed it, last week’s Wall Street Journal featured a behind-the-scenes look at the MGM Grand Hotel & Casino in Las Vegas, one of the largest resorts in the world. If you were to stay in a different room each night, it would take you more than 13 years to get through all 5,043. Needless to say, pulling off such a massive operation involves more than 8,000 employees. As for the laundry, writes Andrea Petersen,