This is a great introduction to relaxed performance from the Lincoln Center in New York. I especially like point 8:
Staff are ready to lend a hand, and a fidget. Front of house staff are trained and available to answer questions, provide information, and make sure that the audience member’s experience is enjoyable. They can also provide accommodations, such as headphones or fidgets, for when it gets too loud or someone needs to re-focus their attention.
The provision of fidgets is a new development, and seems to be a promising addition to best practice. The Autism Arts Festival provided free audience packs, including a fidget, communication badges (green for ‘happy to talk’, yellow for ‘happy to talk to people I know’, red for ‘please don’t talk to me’), earplugs, pens and Post-Its. Similarly, a local toy supplier sponsored free fidgets at a recent relaxed concert in Princeton, New Jersey.