Turns out that I have an option to take classes and seminars at pretty much any division, and the process is only one step removed from student registration. I also got registered for the central library access as research worker, which means the ability to loan books from everywhere in the city. This leads to idiotic situations. Like when (as a student) I had to jump through hoops to borrow each volume of Durant individually, but now, thanks to the powers of loose affiliation, I could hog the whole set for 18 months and nobody can say no. I guess this explains why so many books are hanging on long-term accounts: academic spite.