I recommend Java Wally's (RIT"s on campus coffee shop located in the library)
1) rightfully first and foremost: quality food and drink
My personal recommendation is what they call "Health" Cookies. Of course, surely not healthy for you since it is a cookie, I still recommend it, and it's nice of them to pretend it's good for me. I can tell you it's definitely delicious; maybe they should just call it "Delicious" Cookie. I might never have cravings to eat any other kind of cookie again
For sitting/sleeping/talking/working/wasting time
RIT student artwork on the walls=sometimes good, sometimes terrifying, always interesting
music=usually some good music
Additionally, you are sitting in a room that is connected to the library, and I feel that such close proximity to the library just automatically makes me more studious.