As I expected, I was WAY OFF on my first guess.
I was able to track down the 2007 rounds/revenue numbers for Makefield Highlands (Yardley, PA) a good candidate for this public/private analysis:
2007 Rounds / Revenue
Jan - 486 rounds, $21,000
Feb - 14 rounds, $3,000
Mar - 982 rounds, $64,000
Apr - 2,973 rounds, $217,000
May - 5,680 rounds, $423,000
June - 5,738 rounds, $476,000
July - 6,359 rounds, $466,000
Aug - 5,793 rounds, $417,000
Sep - 4,950 rounds, $378,000
Oct - 3,700 rounds, $272,000
Nov - 2,500 rounds, $130,000
Dec - 747 rounds, $43,000
Totals - 39,922 rounds, $2,950,000
Given those totals, it would take a little over 1600 members at $1800 dues to cover that revenue. If you added in a food/beverage minimum of $75/month, that would effectively add $900 to the dues and would drop the necessary member total to around 1000 members. Of course that doesn't factor in any revenue from outings, events and merchandise which would drop the number even further. Are cart fees assessed at most private clubs?
I would think if you could get the membership number necessary to replicate a daily-fee revenue stream down to 500-600 members it begins to look attractive.