Trump began dancing to the song at the end of his rallies in 2020, bouncing to the beat with his fists poking at the air. “You know what gets ‘em rockin? YMCA,” Trump said on a podcast in 2022.

The president-elect, who ended his campaign rallies by dancing along to the Village People song, has spawned a wave of imitators on social media that seems to have driven the surge. YMCA shot up ...