There is a very well-stocked Mathematical library located at CAB 528. Its hours are not well-stocked, however.
Our lounge has a small library, consisting exclusively of books that appear to have been borrowed from professors, and not returned on account of getting a bad grade from said professors.
The MSS occasionally makes drunken pretensions of having a lounge at CAB 453. There are couches, a microwave, and a fridge, all in an appalling state of disrepair.
There is also a telephone, for making semi-anonymous crank calls complaining about said bad grades from said professors. You could make calls to complain about the general squalor of the lounge, if anyone cared.