College may be a bad example, social interactions are pretty available generally speaking. I think this advice is more targeted at people who are going long str

College may be a bad example, social interactions are pretty available generally speaking. I think this advice is more targeted at people who are going long stretches with big, psychologically dangerous holes in their social "nutritional diet." This can happen much more easily later on. That doesn't mean go to night clubs when you hate them, but it does mean that if you rely on chance, you could go without for a long time. You could join a book club, a political party, volunteer in a kennel, do street art, join a architectural restoration organization, boxing club, sex club or anything that you do like. The thing is that you need to plan something that will include the types of social interactions that you need for psychological health, if they are not serendipitously available in your lifestyle at a point in time.