Watching them
I sometimes watch people for fun, looking at them and try to characterize them, giving them names and professions ..
I usually do this when I'm waiting for trains or just hanging out at some location, for fun.
I shared with son some time back, "see that guy there with the black pants, hoodie and neck tattoos, Johnny, married to Linda, 43 years old, has a 14 year old daughter, carpenter and plays golf badly but appreciates soccer on tv and has an old 1960's car in the garage he spends his spare time on ..", son just looked and filled in, "he also live on the third floor in
So this is now what son and I do when alone waiting somewhere.