The CPR numbers give a hint as to whether aball will bounce higher or lower on a specific surface, and how much friction there is to either slow the ball or allow it to skid on.
The first time I saw Cuponk, the game that requires players tobouncea ping pong ball into a plastic cup, all I could think of was drunken college parties and matches of Beirut, the game otherwise known as known as Beer Pong.