Friends Don't Let Friends Clap on One and Three: A Backbeat Clapping Study
Duke Ellington routinely gave his audiences a lesson in his inimitable style: https://www.youtube.com/watch?v=nPcZ5ex2t-gHarry Connick Jr. didn't bother educating his European audience with any explanation. He simply skips a beat, and then they're clapping on 2 and 4. It happens after the first sung chorus. You can see the drummer raise his hands in joy: https://www.youtube.com/watch?v=yD3iaURppQwAnd, of course, the great Slim Gaillard was so saturated in swing, his predominantly white 1950s television audience SPONTANEOUSLY clapped on the 2 and 4: https://www.youtube.com/watch?v=ZKdrnTTDTqo