What's the noun for theatregoer? Here's the word you're looking for.
theater
A place or building, consisting of a stage and seating, in which an audience gathers to watch plays, musical performances, public ceremonies, and so on.
A region where a particular action takes place; a specific field of action, usually with reference to war.
“In the end, you will hear fellow theatergoers weeping all around you, the sound muffled only by that of your own cathartic sobbing.”
“Stark motifs of injustice, redemption, and the question of whether religion works for the betterment or detriment of mankind captivate theatergoers every step of the way.”
“Feel every jolt, rumble and jostle as D-BOX's Motion technology captures theatergoers and makes them a part of the onscreen action.”