Strange sports was a fruitful topic for projects with multinational students I met and taught here in the UK last summer! (Fruitful in terms of both teaching English and in learning about wildly diverse cultures!)
I tried to teach a few of them how to play cricket (a highly obscure sport if you come from a non-Commonwealth country) and crafted some classroom language learning around it. What was even weirder and more entertaining was a project where students had to research unusual sports and competitions from around the World. It was a lot of fun and we all learnt a lot about such unique activities as sumo baby crying contests and a sorta-kinda one-legged hopping Omani variation on sumo shoving.
As for obscure sports that I’ve actually got experience of, we had a PE teacher at high school who made us play his version of Danish Longball. A hybrid of rounders, dodgeball and British bulldog, two teams take it in turns as the batting side and the catching/fielding side. At either end of the active playing area there are two safe zones and the bowler (pitcher) and fielders stand in the middle. (We played this in a school sports hall, so the playing area was enclosed by the walls that ran down both sides. It turned into something of a cauldron or like a corridor you have to fight your way down.)
The batter steps up and hits the dodgeball-style ball thrown at them by the bowler with their hand. If it’s caught without bouncing, they’re out. Otherwise, the challenge is to hit the ball and then run to the other end of the playing area. If they reach that safe zone without a fielder getting the ball, throwing it at them and hitting them (dodgeball style) under the neck then they’re safe. If they are hit beneath the neck, they’re gone. They then have to either stay in the safe zone or run back to the other side, where they can hit again when they’re up on the block. This continues until there’s no one standing ready to bat or until everyone has been caught or hit out.
If I remember rightly, that’s how we played it but Wikipedia suggests a game with many differences. (For a start, they have actual bats!) Regardless, it was a lot of fun in spite of the fact that it was brutal and intense! Hormone-raging high school teens given an excuse to throw stuff at their peers will inevitably take no prisoners…