Take two mini-sized Table Tennis bats, a standard office set of drawers, a table tennis ball, a 10 foot by 10 foot room and you have Tiny Tennis
Players can juggle the ball (like volleyball), play off the walls (like squash), and move around the table. Like table tennis, the object is to stop your opponent from returning the ball.
We do have a better video than this one from 2008, but we're all a lot older and have to figure out how to use CGI and cover up our bald spots before we can share it with you.