I once went to an Ohio State football pre-game show where the band played and they had the players march through into the main stadium. Everyone was wearing the team colors, every song they played had these hand gestures and words you had to do and say along with the music, and there were all sorts of odd seemingly out of nowhere cheers and exclamations by the fans, the players and the various highly dressed up musicians and officials. If an alien species came down and observed it, I would be surprised if they didn't say this kind of thing had "ritual undertones".