The supplied material contains a player question about cinema and theater interiors plus a building reference. It does not contain a complete, verified room-by-room design, so this page is a planning checklist rather than a prescriptive blueprint.
Official Big Ambitions screenshot — source.
Match the building before planning the interior
Choose the intended building first, then confirm its usable size and business requirements in your version. A layout designed for another property may fail to fit even if it looks similar.
Official Big Ambitions screenshot — source.
Design around operating flow
Reserve clear routes between entrances, service points, customer areas, staff work zones, and required equipment. Add items in the business setup order so you can identify which requirement is missing when the business does not validate.
Treat community examples as starting points
The Reddit discussion is a request for help, not an official build guide. Test your layout after opening and adjust it for customer movement, staffing, stock, and your game version.