Arizona room Wikipedia
An Arizona room is a semi-outdoor recreational room found frequently in homes in Arizona. The room is often a patio that has been covered and screened-in, creating an outdoor feeling while preventing excessive heat and keeping insects and animals out. The room generally borders the back yard of the house and is often accessed directly from the living room, kitchen or other common room of the home.
According to a website run by Phoenix newspaper The Arizona Republic, residents slept in their Arizona room during the summer months, before the advent of air conditioning, because the flow of cool night air made them more comfortable than in an enclosed bedroom.
Arizona rooms are often decorated with Southwestern decor and furniture, and reflect the casual, informal style characteristic of the Southwest.