Well. it is possible to do 4some 18. I have done it many times but keep in mind a few things.
1. some 18 holes likely take 2.5 - 3hrs. Are 3 others with you going to be able to handle it?
2. many systems have trouble running the game for that long without a restart. this especially an issue for laptops.
In my case, I'd grab bollox, jakestanfill, and Ahudd and we be able to finish it very quickly. But we are used to playing for 3-5 hrs in a row, so we know how to pace ourselves and how to play quickly.
Unfortunately, many players for whatever reasons (patience, Internet issues, family obligation just to name a few), just do not wish to do 4some.
In order to be able to get it done, I recommend the following
Join a country club or a league and make friends. Friends rarely quit on each other without a reason.
-wgticon