Since a theater is a venue of entertainment, when you dream of theater aisle, it means you desire to seek some recreation time at the theater. Before having this dream, you might be using the theater as a form of recreational pursuit. That explains why your brain fetches this image, because it corresponds to your usual understanding of leisure.
If you had been working hard in your waking life, then your brain and body may be desiring some relaxation and down time. Then your subconsciousness creates the dream about walking down a theater aisle.
