A guy who lives down the street from me just had knee surgery, he was anxious to recover so he could start playing pickleball again. He is about 70 and has a vanity plate that says "PLY PICKLBLL" or something along those lines.
Until last summer I lived in Austin TX. Pickleball was definitely picking up steam there, and it was not uncommon to see pickleball players setting up shop on tennis courts in the public parks. There weren't any dedicated pickleball courts. Unsurprisingly, this was leading to a lot of tension and bad blood between tennis players and pickleball players.
Now living in Grand Rapids MI, one thing I've noticed is that the majority of public parks have both pickleball and tennis courts. The paddle sounds are definitely annoying, but tennis and pickleball players get along much better here!