Theater

A theater, theatre or playhouse, is a structure where theatrical works or plays are performed, or other performances such as musical concerts may be produced. While a theater is not required for performance (as in environmental theater or street theater), a theater serves to define the performance and audience spaces. The facility is traditionally organized to provide support areas for performers, the technical crew and the audience members.

There are as many types of theaters as there are types of performance. Theaters may be built specifically for a certain types of productions, they may serve for more general performance needs or they may be adapted or converted for use as a theater. They may range from open-air amphitheaters to ornate, cathedral-like structures to simple, undecorated rooms or black box theaters. Some theaters may have a fixed acting area (in most theaters this is known as the stage), while some theaters, such as black box theaters, may not, allowing the director and designers to construct an acting area suitable for the production.

The most important of these areas is the acting space generally known as the stage. In some theaters, specifically proscenium theaters, arena theaters and amphitheaters, this area is permanent part of the structure. In a blackbox theater the acting area is undefined so that each theater may adapt specifically to a production.

In addition to these acting spaces, there may be offstage spaces as well. These include wings on either side of a proscenium stage (called "backstage" or "offstage") where props, sets and scenery may be stored as well as a place for actors awaiting an entrance. A Prompter's box may be found backstage. In an amphitheater, an area behind the stage may be designated for such uses while a blackbox theater may have spaces outside of the actual theater designated for such uses.

Often a theater will incorporate other spaces intended for the performers and other personnel. A booth facing the stage may be incorporated into the house where lighting and sound personnel may view the show and run their respective instruments. Other rooms in the building may be used for dressing rooms, rehearsal rooms, spaces for constructing sets, props and costumes, as well as storage.

There are usually two main entrances: one at the front, used by the audience, that leads into the back of the audience, sometimes first going through a ticket booth. The second is called the stage door, and it is accessible from backstage. This is the means by which the cast and crew enter and exit the theater, and fans frequently wait outside it after the show in order to get autographs, called "stage dooring". This term can also be used to refer to going to a lot of shows or living in a big theater city, such as New York or Chicago.