I got a 119 gram World Class Frisbee in 1975 or so, and read about "Frisbee Golf" in the little book that came with it. Not too long after that I heard that the county had put a Frisbee Golf course in a park about 3 miles from my house. I started riding my bike there and playing with my 119g Frisbee...almost 50 years ago. I have been playing every summer since then (but now I play with much better discs).