to swing one's partner, or simply to swing

We spotlight the star, but the supporting cast has all the great lines in this scene.

Surprisingly, Mignon Anderson, for all her innocence, was born into a theatrical family–in Baltimore, Maryland, on March 31,1892.

This is a flat, unnecessary, and strangely disturbing denial of the fourth-wall convention, that unwritten agreement between playwright and playgoer whereby you think of yourself at the theatre as a privileged, exonerated, comfortably seated eavesdropper.