The new dark comedy is directed by Neil Pepe.
After five years, the Broadway musical gets ready to say goodbye to New York.
The stars of Edward Albee's drama serenaded the late director's memory with a sing-along of "Happy Trails."
Nichols died on November 19.
Tepper's book series explores the history of Broadway's many theaters.
The event honored director Michael Mayer and publicist Rick Miramontez.
Leakes will be the final Wicked Stepmother in the current Broadway production.
Nick Payne's two-character drama plays Manhattan Theatre Club's Samuel J. Friedman Theatre.
Erin Davie and Emily Padgett star in the Henry Krieger-Bill Russell musical revival.