Dan,
I can't cite you the number of rounds presently, but, I've heard terms like "golf factory" and busier that a resort, when describing golf at those clubs.
Baltusrol has no pool, no tennis courts.
Winged Foot's pool is relatively new in terms of its opening.
I can't recall seeing tennis courts at WF, but, maybe they're hidden somewhere.
During summer season, on weekends, they're very busy.
At two clubs I'm very familiar with, they're packed from 7:00-7:30 till dusk on weekends.
Every club has it's own culture, it's own rules.
Some allow fivesomes, some would throw you out for playing in a fivesome.
Some are very restrictive on guest play and don't permit unaccompanied guests, some do.
Many clubs have so many events during the season that the members object to the schedule.
Others embrace every event, so there's no singular outlook.
I know from experiences, that problems have arisen when established, published protocols are............. ignored or violated.
I can remember a club that wouldn't budge on allowing contestants to have a practice round, and for some reason, the pro seemed to be the impediment. Two years later, my club held an event and I thought about rejecting requests from that club, for practice rounds, but, agreed to allow them, not wanting to punish the innocent, even though doing so might have sent a message back to that club that turnaround was fair play.
I know one thing and that's that you can't please everyone.
So, you have to try to do what's right in each particular situation and take the flack from those that disagree.