@younger brother The set is massive. The St James went under a lot of construction and excavation just to fit it in.
2 elevators midstage that bring various scenic pieces up for several locations such as the club, the penthouse, the greenwich village rooftop. One deck trap DS that raises a railing for a balcony scene at helens. several stacked sliding panels/legs that contain doors and clad in brick. US there are a number of layered drops some with brick scrim on so they can be translucent to see the lightbulbs behind or cityscape, some with printed translucencies for the Gowanus 'drop-off' scenes. one drop that looked like a planked wall that had several automated sliding doors in to reveal gangsters, and another drop that was a lightbox that looked like the underside of an elevated train track.
Then of course there is a car (a 1929 Ford, refitted to electric), a train (with US mirrored panels to make it look wider, and girls dancing on the roof!), and in act 2 a tremendous chase scene that takes place on a rolling wagon that is the set of the play at the front and it tracks DS and revolves several times to see the backs side and the gangsters running and climbing all over it. I hear the cast even took a trip to the scenic shop to test this scene out before it came to the theater.
The apt was a quaint little rooftop shack that was also a wagon with a turtle that tracked DS and revolved so a scene could take place out on the roof in conjunction with a skylight that came up SR trap, or inside their cramped little bedroom which was intricately decorated.
And, man I wish I was in the lightbulb business - I could have made a killing on this one!