How can you make muscular endurance fun?

Developing muscular endurance can be fun, you just have to be creative and hopefully have a partner. You could make up games to help each other or set up competitions with each other. Of course if you two are of unequal abilities then you will need to do something called a handicap. For instance you could do a run for a mile, but give the slower person a head start, then each time you repeat it you adjust the headstart to make it as even as possible.