Here is an idea. Public courses have marshals. Marshals can observe foursomes that are waiting, and foursome that are causing people to wait. Have the marshals hand out discount coupons to foursomes that are waiting each time they see them. Raise the green fees so that those not earning the coupons are paying more.
Garland,
That's a labor intensive process, one frought with controversy.
Why not merely clock the groups off the first tee, clock them as they exit the 18th tee, with the understanding that groups should finish within ___ minutes of the group ahead of them.
(tee time differential = 8, 9 or 10 minute intervals)
Groups that complete 18 in less than 3:45-4:00 and equal to or less than the tee off interval, get a rebate.
The critical issue is that once one group falls behind, the balance of the golfers behind them can never catch up, so, it's in everybody's best interest to make sure that every group plays at pace.
This way, the individual golfers in the foursome, as well as the field behind them are the policemen, not the golf staff.
It's a simple, yet highly effective system, and, it works in the field.