Love this “magic moment” from the Warriors where a contestant gets an assist from an MVP mid-game.
Obviously players jumping into a contest or promotion is rare and difficult to stage or plan. The key is to set a playful tone. This rests with your staff and court crew.
Small things like open body language can give a soft invite. Pivoting your body so you don’t block out someone is a simple change from physically saying “Enter with Caution” instead of “Do Not Enter”. Talk to your court crew about being alert to the people, staff and players around them at times as way to help “allow/encourage” these impromptu moments.
For more on Open Body Language, you can see this helpful page of examples.
