Well, I sympathize, but since I've been in the academic world for a long time, I can tell you and everyone that it's changed a lot. I really can't offer a lot of hope. Some 15 years ago, one of my students tried to get access to the lab at U. Washington (Seattle) where I had very strong connections. My strongest connection called me up and asked "Who does she think she is? God?" There are a lot of reasons why schools limit access, and they aren't all because the faculty members believe that they are themselves gods. In the recent past, it has been because there was overwhelming demand, and as someone else mentioned, the fear of litigation trumps everything.
Give it about ten years or so; maybe not even. I've already noticed in my facility (where we do allow outside use by students and even outside community for a startlingly small fee - $35 for a ten week quarter) that digital has sucked the riff-raff away, leaving a few highly committed takers. My own retirement plans have been delayed partly out of fear that if nobody is promoting usage, they're going to look at the space we take up and calculate how many computers they can fit in there. I'm going to retire this year but also, plan on teaching workshops. Anyway, we are actively recruiting users, and some interesting folks have been showing up. Unfortunately, we are about as far as you can get from Philadelphia without leaving the lower 48.
I've had all manner of darkrooms. Check out Steven Pippin, a winner of the Turner Prize some years back. He said that as a child, he became interested in photography hanging out with his father. The family was so very poor that his father would go head first into a sleeping bag to load film into a daylight tank. With me, it was sort of the same, sometimes. I've actually done that. I had a room in a partitioned victorian house in Portland, Oregon, with a murphy bed and some laundry tubs. I had to fold the bed up on the wall. There was a long green "dresser" that served for a "sink", though sink it was not. Just a counter. The chemicals blistered the paint. There was a table that supported my Omega D3 (I had my priorities in order). I took workshops with Minor White. Minor said "I want to see your darkroom". I was terrified, but who could say no to that? He saw it, and said "I've had darkrooms like this". He told me that Barbara Morgan said that darkrooms reminder her of s**t, because she'd had so many bathrooms that doubled as darkrooms. I've done that several times, too. It's how I started. My stepfather's darkroom was the downstairs bathroom. My last darkroom had a toilet sticking out from the counter I'd set up to place the trays on. I had to straddle it while processing prints. I do not look back on that one with much fondness.
Now I'm building a darkroom in a 6x16 former contractor's shop trailer. The theory is, that it's going to be my last darkroom, and if we move, I never want to have to build another one. Also, it will be great to be able to drag it around.
Are there any chicken coops in Philly? Uh, you got to get the chickens out first. Imagine the consequences of feathers! Remember, though, that getting water in is possible with buckets. Getting water out is the big challenge.
Good luck. I just added you as a contact in flickr. Keep in touch. I like the way you think.