The class act style of tap dancing exhibited a very classy aesthetic form of entertainment as the dancers performed identical steps in perfect synchronization. what is it sometimes referred to as?

Picture dancing

Explanation:

In 1914 when Thaddeus Drayton and Rufus Greenlee came back to New York, they created an act that saw them wear matched formal dress and then with a stylish but sophisticted style of dancing that combined cakewalking with astonishing steps, ballroom dance, and strutting. Their steps were identical and done in synchrony. This act was termed Picture Dancing, similar to the dance described in the question.

answer; the trial de novo