Flint was at the courts pretty early, ~8:30, basket of tennis balls and a bunch of racquets on hand. He actually had to try pretty hard not to over-organise things, because this was just playing, basically. He would've greeted everyone who turned up and asked them their level, and matched people up by that. If there were any beginners/people who didn't know how to play, he would've showed them, and tried to do so with some patience.
At the end he would've been like thanks for showing up~ and secretly appreciated if anyone helped him tidy up a little.