No one is pressuring you into smoking weed so relax. And if people offer you some and you say no and they look at you funny then who gives a crap. Honestly i'd way rather have kids on the course popping into trees to smoke weed real quick rather than all the douche bags who leave all their cigarette butts on the course and break glass bottles everywhere. I've never seen someone smoking weed who's made a mess of the course because they were smoking.
I think smoking before you get to the course is the ideal scenario, if at all. But I must say that it doesn't bother me at all. If I had to chose one, I would rather have a course full of stoned golfers over drunk ones. You have to worry about the drunk one being loud and obnoxious, peeing within sight of other park goers,littering(pot smokers save their roaches) and of course being aggressive(throwing discs at you and saying get off our course). Who knows drunk golfer might have a gun in his bag or car so don't return verbal fire with drunk golfer. The last thing stoned golfer is, is aggressive. He might drop a few twinkie wrappers and he might lose or forget where his disc is though. In my opinion it's prob better to tough it out and do whatever you do before you get there.