This one is fun!

Imagine a large courtyard, that is made from conducting plates. On top of these plates, there is a insulant layer of material. 

You charge the plates with +Q, and keep them charged while the courtyard is in operation.

People wear special shoes, that are have conductive material on them. You charge these shoes with +Q, just to say a number, it actually needs some studying to come up with a good number for the charges. 

When people move on the surface of this courtyard, they should float and slide just as in ice skating.

This is meant as a sport. You can make it more like hockey if you would like.