People tend to check in during these times:
Fuller Laboratories is named for George F. Fuller, a longtime WPI trustee. This building serves as the heart of the Institute's computing infrastructure, which reaches every classroom, lab, office and residence hall room on campus, not to mention the fraternity and sorority houses.
3rd floor sun room, nice, quiet place to study or hang out between classes
Interaction Lab is on the basement level, B-16. You must visit it if you're interested in robots!
Free movies for students every Saturday and Sunday night at 8pm