The original posters was looking for ideas, once a slow group has been identified a more direct, zero tolerance approach needs to take place.
insist the group play:
with a 2.5 foot gimmie rule.
with mark my ball once rule on the green.
allow for preferred lie everywhere.
without "honors". ready golf including the following tee shot.
Sounds has though some course changes have been done, rough has been cut etc. other suggestions on known busy days, easy tee boxes and easy pins, throughout the course. If you have a restaurant can signs be put up on the 8th or 9th tee with a simple light menu and the bar/restaurant telephone number. The menu could also be displayed in the cart.
I am always amazed clubs do not do this
This is what I'm looking for now, suggestions we can give to slow groups to speed them up. I am consider printing up a list to hand out to slow groups at the first warning. I already have some others in mind.
Then, suggestions as to what options we should consider for those groups who do not speed up, that the Pro or GM would communicate at the third warning. I have some of those in mind, too.
When this is done, I will post all the reasonable suggestions for others with the same problem.
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I appreciate that a sense of realism has been injected, that a course has to mediate with moderation, that a my way or the highway policy will likely turn the place back into overgrown fescue and rocks.