Organize a friendly mixed-experience session by agreeing on its purpose, involving the host and offering appropriate practice or pairings without promising evenly matched scores.
Follow an unfamiliar open-play rotation from check-in through waiting, court entry and departure, without rearranging a queue to match the system used at another venue.
Apply the current line-calling principles, distinguish an observation from a guess and use the appropriate organizer or official instead of turning a close landing into a debate over motives.
Agree on simple shared-ball words and rehearse them in a slow doubles exercise, so communication helps your partner understand an intention before both players commit to the same ball.
Use a short pregame conversation to clarify experience, format, shared-ball communication and feedback preferences without trying to solve every tactical question before play.