What are the most popular student activities/groups?
A huge part of life at Williams is spots, whether it's Varsity, JV or club. Sports teams tend to practice, play and party together, sometimes living together as well.
Big events are Homecoming and Spring Fling, but there are school-wide events throughout the year. Most common are parties hosted by a bunch of friends, a house, or a dorm, either for a birthday or some theme. Frats and sororities don't exist here and I think that is a huge plus for this campus.
The dating scene consists of either long-term couples and random one-night hookups - there isn't much in between. Casual dating - for coffee, dinner, get-to-know you stuff - is pretty rare since the school is so small.
The school brings in a ton of amazing guest speakers, but with so much going on these are not always well-attended. Still, this doesn't take anything away from the enjoyment of those who do go. There are also lots of theatre and dance events which take place in the brand new '62 Centre for theatre and dance and these are often very popular.