Hi Sven,
I have two close friends who actually played what was (I think) the 6 hole course on GI...but didn't they get rid of the golf course altogether when it changed state-federal ownership some decade or two ago.
I remember one dedicated local feature (Met Golfer or NYT Sunday magazine?) to the golf course going back 20-25 years perhaps, I'd love to find that again.
Two I didn't mention previously (b/c they aren't golf course features per se) were
Leewood - the famous "Babe Ruth Tunnel" cut under the Bronx River Parkway - allegedly so the Babe could get in a morning round and get right onto the BRP from Tuckahoe to the Stadium, which otherwise would take 2+ miles local driving (N or S) to the nearest on-ramp. The scholarly camp has always been divided on this as apochrypha or truth...but I can relate that 25 or 30 years ago, the old nightwatchman-former locker man at Leewood who went back to Ruth's time, used to regale the odd visitor about Ruth's legendary hangover revivals in the mornings at Leewood...I think his name was "Jimmy" and many was the time (allegedly) that he turned on the lights to find the Sultan of Swat in various states of dawn disgrace...One thing I never understood was how the Babe was a member at Leewood and not somewhere closer (at that time Dunwoodie in Yonkers, 5-6 miles closer and filled with Broadway types when a private course or one of the courses that existed in Pelham).
Bedford Golf and Tennis Club- I haven't revisited the story (or the course) in some time, but the old cottage-shack-farmhouse that existed nearby the 10th hole claimed to have been the oldest-still-extant clubhouse structure, predating Shinny by two years.
cheers vk