Main Hall consists of six rooms and a corridor connecting them. Three of these rooms appear to be bedrooms, two of which contain a vent. These vents lead to the vents in Engine Room and Kitchen. There is also a room full of cleaning supplies, which contains a vent that leads to either side of Gap Room, and a darkroom for completing Develop Photos. This room does not seem to have any lighting, as when a Crewmate enters, their vision shrinks as if Fix Lights was ongoing. Players outside of the room cannot see inside. The left exit of this room leads to Engine Room, while the right leads to Showers.