The building is nice, always way too packed for my liking, selfish people who leave their stuff for hours at a spot. Always makes me go to graduate lounge. Stacks are like treasure hunt for books.
2nd floor across from the Men's bathroom is a study room; turn right as you enter and there a super quiet study area attached that has amazing alcoves to hide away in for hours.
Surprised no one's mentioned this yet, but students sometimes hook up in the stacks, or the top floor construction areas... for the Undergraduate population, it's like a right of passage.
Talk to Dwight at the front security desk during the graveyard shift (Wed nt to Sun nt) about the interesting stuff that people do in the library at night.