Yes and no. I'm a fairly gregarious person, and in at least a few of the places where I've worked, I've gotten to be friends with most of my coworkers. We've gotten together for dinner, gone out together, and generally chatted about most of the details of our lives. And as a whole, most of them.... just didn't do anything. They looked at my hobbies, and speculated aloud that I was insane, and when I asked them what they did in their spare time they just drew a blank.

It was the same with a lot of my classmates in vet school, too.