Volleyball: sand or indoor, but with people
It's the sport here that depends most on gathering an exact number and needs the least infrastructure to start. A net on the beach and eight people is the whole of it, and the eight people are the hard part.
What defines a game
- Sand and indoor are two sports
- Four-a-side on sand and six-a-side indoors share the rules and not much else. Anyone coming from one notices the other on the first point, so it's said up front.
- The number is exact
- One short and it doesn't play the same; one over and somebody is watching. Publishing the places missing is what gets the game started with the right number.