Secret meet-up

I found this place by accident a couple of days ago. But I didn't bring a camera, so today I returned with a camera and some coffee. It's an old work shed in a train repair area. This particular place was well hidden, and I accessed it through a hole in the floor/roof. Another angle.
I'm wondering what it's been used for...
I will definately return several times, so please get used to the idea of seeing this place again.. :)
Worth watching LARGE