Kickball season seems to have just started. At least, it was last week that I first noticed a couple of the young wearing their team shirts.
My generation gave up kickball at about age 12, maybe 11 if you don't count PE. Playing kickball at 13 or older would have caused one to be seen as simple-minded or simply uncool. Of course, so would have many actions that the distinctly cool do now: buttoning the top button of shirt not worn with a tie; wearing a tee shirt under an athletic shirt; wearing dark socks with athletic gear; etc.
A co-worker of about 30 tells me that mostly this has to do with drinking, and in fact one of the shirts I saw today showed that the team was sponsored by a bar on Capitol Hill. I am sympathetic to physical activities that serve as an excuse for subsequent beers, not that I ever required much of an excuse. I suspect kickball is supposed to be ironic. if so, the irony is lost on me, which would be satisfactory to the ironists and to me.