Yes but I do it all the time everywhere. Back when I worked in retail and I couldn't see my employees over the racks, I'd yell out "Marco" and they'd "Polo" back to me so I'd know where they were. I sometimes do it with my kids at home. I have no idea where it originated though.
Like others, I never caught on to the game. I just heard others in the large public pool yelling it. And I went back to the diving board or slide or swam with my friends who never seemed to play the game.
This post was edited by WelbyQuentin at August 30, 2021 7:52 AM MDT