I've been lucky in that *most* of the time, I had a pretty fun group of people to hang out with during interviews.
We talked a little bit about snowboarding:
"Oh yeah, I suck at getting off the chair lifts. I just gave up. I would fall just to get it out of the way and then crawl off to the side."
We made jokes:
"If I don't get into medical school, I'll just be a doorman."
I've always been a people-watcher so I also had the chance to get a sense of what people were like when they started opening up. The experience made me realize that I'm pretty spoiled by being in a major city in California.
There was one girl who was very, very eager to take a picture with an individual who is an ethnic minority in the U.S. because she also had a friend whose family is from that part of the world. I thought that was really rude...but that's because I grew up in a place where that kind of behavior, even thought it's not violent or intentionally harmful, is frowned upon. I also took a few humanities courses in college that focused exclusively on race/racism and how they affect communities in various ways, so I'm also more sensitive.
At one interview, there was one group that I traveled with to/from the hotel and campus. We just happened to use the same shuttle service. That group was really fun - we shared a round of drinks and food afterwards and talked about our college life and whatnot.
Interviews are interesting. After my first round, my friend asked, "So what did you think of your potential classmates?" I had never thought of interviews that way. It kind of makes sense to think that way, and it kind of doesn't. The group of 20-25 people I meet are people who are chosen by the university as potential students - we probably share numerous qualities that the university likes while retaining other qualities that are unique to ourselves. My ability to mesh with an interview group might indicate whether or not I would get along with my fellow classmates. If I didn't like anyone in my group, it might be an indication that I may not mesh very well with the class.
Then again, these 20 people do not necessarily represent the matriculating group. I also tried to keep in mind that "beggars can't be choosers."
At any rate, it was nice to have people to unwind with before and after our interviews. There were always a few unlucky individuals who had very aggressive, tough interviewers and they would commiserate while we sympathized. I think it made the day much more bearable.