I live in South Philly. Several of my friends and I will head there at night just to bang beat up range balls or play an emergency nine.
What is most upsetting is certainly not the loss of the course, f/k/a League Island GC (h/t Joe Bausch). It is the fact that the First Tee has a strong presence there, with camps running all summer and on weekends. Rather than make a buck or two on eBay, I actually just donated a full set of Mizuno MP-30s three weeks ago. The guy in the First Tee building who took them was very appreciative and told me he would give them to a kid to keep as a set.
I imagine most of the First Tee will be moved to Walnut Lane and other locations, but they already have a building there with indoor putting greens, simulators, etc.