No interior for Ameri-Towne Palace Theater?

here are a few idea's 

Too big?

Well, the reason there is no interior may be that the only niterior you can normally see into in a real movie thether is usually just the ticket booth andmaybe a small part of  the lobby.  I imagine that would be easy to add.  

I scratch built this theater, and put in a ticket booh with attendant and a small roll of tickets in a machine, etc., as they used to have, and a small lobby with popcorn and candy sales counter, etc., which it proves nearly impossible to see: even in close up photos the lighting is not quite enough to show through - you can only barely make out there is something else back behind the doors.  

If it is a movie theater you'd never be able to see the seating. Even a play house would most likely not have the stage visible from the street. Something like Lee has done would be most realisitc.

You will need to first determine which era you wish to model. Here's an example of how the same lobby has changed with the times.

Entrance: