In the 80s, you couldn't take a piss without hitting a racquetball court. Now there are seven public courts in the entire city of Chicago, with five of them in modest means neighborhoods on the south side. That last part, I think, is pretty telling. I don't know even one person who plays. Do you? I'm not sure anyone who told me they are off to play a game of racquetball, or they recently played a game of racquetball, for at least a couple of decades now.
And Wallyball! Man, I forgot all about that one, but yeah, I played that, too.