The phrase "to leave the theater" means to exit or go away from a place where movies or plays are shown.
Sentences with «to leave the theater»
You may not be wiping tears away from laughter, but there's a very good chance that you'll still leave the theater with a smile. (qwipster.net)
Even more so, he wants the audience to leave the theater feeling good. (cbr.com)
Besides, if everyone leaves the theater in complete agreement, from a storytelling perspective, you're probably not trying hard enough. (edition.cnn.com)