Universal home entertainment systems and home theater systems, comprised of one or more modular components, such as prosceniums, linkable walls, trap doors, columns, slots, roofing, sets, stages, green rooms, makeup rooms, storage rooms, and other rooms and/or entertainment spaces; home theater systems comprised of curtains, desks, chairs, background decorations, poster boards, and other fixtures and furnishings related to creating an alternative home entertainment experience; interchangeable...