The musical is based on the screenplay for the film All About Eve and the original story by Mary Orr. The original production, by Joseph Kipness and Lawrence Kasha, was directed and choreographed by Ron Field. It opened on March 30, 1970 at the Palace Theatre on Broadway and ran for 896 performances.
The plot concerns fading actress, Margo Channing (played in the original production by Lauren Bacall), and the efforts of the young and ruthless Eve to undermine her and steal both her career and her man.
Applause (Latin applaudere, to strike upon, clap) is primarily the expression of approval by the act of clapping, or striking the palms of the hands together, in order to create noise; generally any expression of approval.
Applause during a symphony is now regarded as a breach of concert etiquette, but not always in opera.
During musical events, however, it is common for an audience to clap in the rhythm of the song, to cheer the artists present on stage.