Only 30 years ago, few casinos had high-limit areas.
Rich people like to hang around with rich people.
No one likes to hang around with poor people. They're more upscale than the main casino. We don't have doors, but use railings to make them think twice about coming in. Las Vegas Professor Bill Thompson said casinos want to maximize their high roller action. The technology exists, he suggested, to allow gaming regulators to monitor casino action by video.