With courtly manners, all the rules of general manners stay in place: keep your elbows off the table, don't run in the hallways, keep the conversation away from yourself unless prompted, and so on. But there are also manners of station to take into play.

Don't talk to the Prince unless he introduces himself to us. Use proper forms of address: Miss or Mister so and so for the servants, your highness or your lordship for the Prince. When talking to his servants, use a formal tone--don't pry into their personal lives. Don't put on airs but at the same time, emphasize that you're the Ringmaster's such and such if you introduce yourself.

There's more, of course. [ they will be here all night. ]