Guests also included Lauren Pritchard, Drew Gasparini, and more.
The fictional musical takes the stage at 54 Below on Sunday and Monday.
The concert, produced by Jennifer Ashley Tepper, was held at 54 Below earlier this week.
The score of the Tony Award-winning (fictional) musical will be sung on December 9 at 54 Below.
Lewis and Jordan will join Bernadette Peters in the new Sondheim-Marsalis collaboration.