For jazz, rock and blues playing, we emphasize counting on the 2nd and 4th beat. This video shows how Harry Connick Jr used rhythmic displacement to get his audience to change from clapping on the 1st and 3rd beat to the 2nd and 4th. Rhythmic displacement is when you play the same melody or phrase but move it to another beat in the measure. In this case, Harry Connick Jr shifted the melody by 1 beat so the crowd would be clapping on the 2nd and 4th beat of the measure. Pretty cool.