Here is a completely general generating process for making a room

Set the focal point of what is to become the living center. Make a boundary which is the outer boundary of the place, which is to focus on this focal point. Thicken this boundary, and make it up from smaller coherent ornamented centers, thickened, and significant in their own right. Inside the boundary, shape the main center, a large zone and space which is supremely positive in shape and character. There is a gate or entrance to this place. Create a gradient which leads from the entrance point towards the focal point. Shape the focal point as positive space. Around the focal point put detailed centers of romantic and touching quality. Against the romantic touching quality, put a stark simplicity and plainness that sets it off. - www.patternlanguage.com, Christopher Alexander