I'm not a huge fan of foyers. To me they are rather a waste of space which always irritates me. In the house I actually live in, we have a very small area where the door is with walls to either side of the door but there are no doors to other rooms or arches or anything. So I guess in a way it is a foyer but being open it doesn't interfere with having rooms going off from it. On the other hand, the house I live in is pretty weird anyway! lol Most of the houses I build do not have foyers at all.