what if you have 4 people who usually play in alotted time on championship courses, but because of another appt, one of the 4 would only like to play 9 holes. Also, my friends and I play alot of 9 hole golf and it doesn't mean we are slow, sometimes we just want to play 9 holes.

If your post made sense....
 

by including your reasoning it would be easier to respond. Just saying it would allow 18 hole players to keep pace is ludicrous....as for they should be changed to after 2pm...how would that allow them to finish prior to sunset? They go off now at 1:30 and easily finish...at 2hrs10min. they could tee off at 3:15 and still finish...

During this time of year, I think you have to pay for 18 even if you decide to quit after 9. If there is a weather condition (rain, cold, etc.) you might get a rain check for half the fee, but I'm not sure of that. After mid-May, you can play just 9 and pay half the 18 hole rate anytime.