At Versailles the King and Queen would dine publicly. You may recall the awkward yet humorous dining moments from the 2006 movie, Marie Antoinette.
This tradition took place in the Queens antechamber, and both the public and members of the court would attend. Those traveling to Versailles from abroad made sure to make an appearance to the event. People did not just gather around the table and stare. They were allowed to walk through the rooms, checking out the decor and mirrors! It was like walking around a museum but they could not quite approach the dining table.
Standing between you, the viewer and the royal couple's spread, was a line of impenetrable Swiss guards. There were also guards at the main entrance making sure all that were attending the event were dressed in a presentable manner! So if you didn't wear your best, you may not be able to watch your sovereigns eat!