Room roles are assigned to a room based on what is inside them, such as a bedroom or barracks.
Rooms have stats. This includes Impressiveness and its 4 composite stats (Beauty, Cleanliness, Wealth, Space). These values are defined from the items inside. Stats can be inspected using the room inspection tool found in the bottom right of the screen. Rooms can fulfill multiple roles at once, despite the game displaying only 1 label at a time.
Certain room types grant a mood effect based on how impressive it is, and rely on all of its substats. To gain it, the room must be used by a character for its associated purpose (ex. eating at a table in a dining room). They are typically applied when a colonist begins said activity in the room, and last for 24 hours. Not all rooms have moodlets related to Impressiveness.
In addition, hospitals, laboratories, and kitchens make direct use of the Cleanliness stat. In other words, a medical bed, simple research bench, and electric stove all function off Cleanliness. Players may put several of these buildings in the same room, to take advantage of the stat for all of them. Pawns also have seperate needs for beauty and space, which every room can fulfill (unlike the room stat, these needs are checked within a certain radius from the pawn, as opposed to anywhere in the room).
List of roles
* = This room changes to the ideoligion's set temple name if its altar/ideogram was placed.
Other pieces of furniture not mentioned, such as chairs, should not affect the role of the room. For rooms with the bedroom role, when the bed is given an owner the role of the room will change to "Owner's Bedroom".