As soon as the green light was given for the Mississippi casinos reopening the crowds were streaming in. The Coronavirus outbreak shuttered state gambling halls nine weeks ago, and players have been welcomed with new operating rules. Gamblers returned to card tables and slot machines on this first day, happy to be out doing just about anything. Though the sound of slot machines has a familiar ring, for casino goers there is much that’s not familiar at Mississippi casinos under new COVID-19 operating rules. Gamblers are thoroughly checked out before they enter and must answer questions concerning their health. Casino…