Mike,
I wouldn't mind a bet that this came about in conjunction with longer rounds. If I can manage five hours away from home in the weekend for golf and a round takes three hours, I'm going to spend more in he house than if a round takes 4h30.
Chris K,
Bonnie Doon has the same arrangement as you describe. No dinner outside of functions and one Friday night a month in summer, quality lunch options every day, the clubhouse minimum is also there to use for on course purchases from the drinks/food cart.
Ours is only $300pa, so a beer a week. You'd have to be tight to take issue with that, IMO.