Immersive theater, where a staged production interacts with the audience, is an age-old tradition.Currently, it is a technique used by producers across the country to eliminate the traditional “fourth wall” that separates the audience from the actors and allows the audience to walk through the scenes as the action takes place.I saw such a performance last year with Windy City Playhouse’s Jeff Award-winning production of “Southern Gothic.” There, the audience wandered through a home during a …