I know I've written about this before but I love the library at IIASA with its self check-out system, long-term loans (minimum 2 weeks, maximum a few years) its a marvel of efficiency in comparison to home. Maybe it is the contents I appreciate, the service just makes it better. The library is almost entirely made up of systems analysis, statistics, policy, modeling and decision-making textbooks, all helpful to my research.
The library has two reading rooms which in today's world of electronic journals and online books may soon become a thing of the past. The lighting fixture in the room is worth taking a peek at.
If you zoom in on the photo (not compulsory I promise), you'll see a multitude of yellow slips sticking out from between books. These indicate a book has been borrowed and by who.