As Alan said,  whatever you do you will alienate someone.

What I did with the Brunswick ECD was to ask all of the dancers

  - would you dance if masks were required

  - would you dance if masks were optional

and so on.

Then I picked the rules that maximized the number of dancers.

I realize that this is harder for Contra, where you have a lot of dancers that you can't ask, including potential future dancers.    But in my case it seemed like the right way to do it.

John Bloom