My informant told me of a ritual that she used to do at her high school theatre. Before a performance, everyone involved in the production would stand around a candle, a “good show candle” as she called it. They would light the candle and all stand around it with their hands crossed right over left, and they would hold the hands of the people next to them. Each person would take a turn to tell stories or say good things about their fellow actors and techies. This would go on for about 10 or 15 minutes before the show starts. At the end of this, one person would squeeze the hand of the person on your left, and then that person would squeeze the hand of the person on their left, and so on. And once it had gotten back to the person who started it, everyone would throw their hands into the air and as they did they would all say “Goooooooooooooooooood showwwwwwwwwwwww!” and then twirl around and face the outside of the circle, and then everyone would be ready to go.
According to my informant, this ritual is performed at other theatres as well.