Social activities on Campus - Tour last week

We took a tour last week and it was difficult to get a feel for the campus. We did not see many students walking around mid-day so we couldnt get a good feel for the energy of the campus. Our tour guide addressed the formal activites such as a walk in the woods but did not address a typical Friday or Saturday night. What are common college sponsored activities? Do the students all study very late each night in the library as she mentioned? My daughter is interested in pre med and the program she did really know much about. Any thoughts would be helpful.