Dano
Didn't you used to be a NASA rocket scientist? I think all this Japanese Poetry stuff has mushed your brain, or perhaps you were just trying to spoof us when you implied that slow players could accommodate narrower tee time intervals that fast players. If you make such ridiculous assumptions, of course your "math" will work!
Let's get back to reality.
If you have 3 hour rounds you can get people off the tee at 5 minute intervals (180/18/2). Assuming 12 hours of daylight and having everybody able to play 18, this allows for 9 hours of tee times, with 48 players per hour (60/5*4). Total rounds = 432. At $100/round this is $43,200 in revenue.
If you have 6 hour rounds you can get people off the tee at 10 minute intervals( 360/18/2). Assuming 12 hours of daylight and having everybody able to play 18, this allows for 6 hours of tee times, with 24 players per hour (60/10*4). Total rounds = 144. At $100/round this is $14,400 in revenue.
Now I know this is all theoretical and exaggerated (of course, so was your straw man!), but it seems to me that you would have to sell one helluva lot of beer to make up that gap in income.
By your logic, airlines should just circle airports for an extra hour or two in order to increase their beverage sales.........