Juggling. Friend decades ago taught me how to group juggle with other people. Lots of fun. But I've learned never to admit I'm into juggling, cuz apparently it's serial killer weird
I can juggle 3 balls but no more, its quite intuitive once you try! I know 3 is basically nothing, I just learnt it when I was like 10 and never took it up.
But that is a great hobby man, join a circus or smth idk.