Over the years I've sometimes found groups arranging drop-in tennis or drop-in ping-pong. I made friends there, and it was a major part of my life. But none of

Over the years I've sometimes found groups arranging drop-in tennis or drop-in ping-pong. I made friends there, and it was a major part of my life. But none of those ever seem to last for more than a couple of years. Whoever controls the tennis courts eventually bans the group or intentionally schedules other things at their regular time. They always tend to view somebody scheduling things on "their courts" as an intrusion. The ping-pong meets a similar fate, especially since it is already hard to find places with more than one table, so as more people start to show up the drop-ins are told that they are no longer welcome. Private clubs are the same way - they monetize their resources, so they don't want "bursts" of activity that would inconvenience the regular flow of resource availability. I know this from experience (I've belonged to probably a dozen tennis clubs over the years.)