if i remember right it's that huge driving range on the left side of algonquin. since it was the only place i associated with golf in the game i just grabbed the first comet i found in the north parking lot (the one by the burger shot) and it was the car i needed. if you've never taken notice of the driving range it's got huge netted in walls and sticks out into the body of water between algonquin and alderney (west river i think).
yea i found it a few days ago by accident. i looked forever for a golf course never even found it, but i see the range now. the rest so far have been pretty specific to where they are.