Cafeterias are relatively rare compared to other room types, and most Hideouts will contain none at all. Those that do will rarely if ever contain more than one Cafeteria.
Cafeterias tend to be expansive, taking up a large amount of space compared to the benefit they give.
As with all other rooms, the layout of a Cafeteria is randomly generated when the Hideout is first created. However, most Cafeterias tend to contain one or more of the following pieces of furniture:
Each piece of furniture may or may not appear in each Cafeteria you encounter. There may be more than one of each, as well.
Note that both Paintings and Lamps will always appear up against the south wall. Other furniture pieces will be scattered away from the walls.
If a Painting in a Cafeteria is bugged, it will increase the Surveillance Quality for this Hideout by +2%. This makes the Cafeteria the worst possible Room to install a bug in, assuming you can find a Painting here at all.