Yeah I know a court in Brooklyn this is a problem too. One guy gives a lesson and then waits for his other instructor friend to come give a lesson, essentially unethically hogging the court for hours.

I mean the basic etiquette is first-come first-serve and needing both playing there to start, and not taking over an hour. "Hand-offs" and shit like that shouldn't fly.

And yeah, I'll definitely be a huge (justified) asshole if I see that continue at my local court.

An on a similar note, losing all the East River courts in Manhattan this year last was huge (due to redoing the park to raise the seawall). Already a lack of easy-to-get-to places to play, and that was one of the best. Still at least another couple years until those will be re-made.