OP here: Thanks. One more thing: the adjacent basement room (nicer room than the laundry storage room , but less nice than the upper levels) also have flat doors. They are hinged and they look better than the doors in the storage rooms, but they are also flat and boring. (The upper floors have very nice panel doors). If I change the doors in the laundry / storage area to panel doors then the two basement rooms will have mismatched doors, one new panel, the other flat. I think I will just add a flat lauan bifold door in the washer and dryer, and then add some simple trim to all the doors in both basement rooms, somewhat like this video.
http://www.youtube.com/watch?v=N6qiqpicRqc
I have some leftover molding and like using my miter saw. I will just leave the doors in place. It will probably cost me $30 plus half a Sunday. And I can design the molding to match the panels in the nice doors in the upper floors.