We have had a good sized group of friends at the Naugas for the last few days. They all are about the same age, most having graduated from one particular Midwestern high school in 1981. Some of the graduates go out hiking the trails together, some ride horses together, others just sit around and talk about their old classmates and teachers from junior high and high school.
I learned that they all got together because one of them bought an old high school yearbook / annual online to help find the other classmates. The yearbook had lots of personal notes written, which helped to remember who was friends with who. I think that is a good use for high school annuals and yearbooks, ones that came out before Facebook became popular.