A claim club is like a group of friends who share toys. Imagine you and your friends have a bunch of toys you all love to play with. Sometimes, one of you might want to borrow a toy from another friend. To make sure things are fair, you might make rules like "if I borrow your toy, I'll give it back soon," or "if I break your toy, I'll fix it or buy you a new one."
A claim club is similar, but with grown-up stuff like land or mining rights. People join the claim club when they own a piece of land that might have valuable resources hidden underneath, like gold or oil. They agree to share the land with others in the claim club and follow rules about how to use it.
For example, let's say some people in the club own land in an area that might have gold deposits. They agree that they will all work together to try to find the gold. If someone strikes gold on their land, they share some of the profits with the other members of the club.
Having a claim club can be helpful because it allows people to share the costs and risks of searching for valuable resources. It also helps make sure everyone is following the rules and treating each other fairly.