Greg Wood and Kathleen Wallace star in the Philadelphia production.
Reunions from the casts of Taxi and Who's The Boss? took place as Danza welcomed friends including Judith Light, Danny DeVito, Christopher Lloyd, and Marilu Henner.
Judd Hirsch, Carol Kane, and Marilu Henner were also on hand to congratulate Danza on his Broadway return.
The solo play is cowritten by Greg Edwards and Andy Sandberg.
The organization hosted a screening of the new film To Russia With Love.
The actresses are the newest leads in one of the most beloved shows on Broadway.
The musical officially opened at the Stephen Sondheim Theatre on January 12, 2014.
The singer is set for a limited run in the Kander and Ebb favorite.
The Venus in Fur playwright will premiere his collection of short plays at the Duke on 42nd Street.
The sixth edition of the series will play 54 Below.