I worked at a place like this. They served dinner at 7-8pm, and you only got it if you worked at least 10 hours that day. I remember one day, one of the managers suggested that we up it to 12. "We're spending $30,000 a year on food; it's ridiculous." Yeah, but considering all of the extra hours you're getting out of people, paying an extra portion of a salary per year doesn't seem like a bad deal.