I would LOVE the house slipper bit. I've suggested it so many times. Wife and kids just won't go for it. Wife says it's rude to ask a guest to take off their shoes. I disagree but she just can't see my point or view. If you want to enter my house, show respect and take off your shoes to keep my house clean.
I have multiple guests slippers at the door with internal shoe cleaner also to hand, but that's mostly for show as we clean them anyway. Regular guests eventually get to choose there slippers and we'll get what ever they want.
I'm sorry, what do you mean by "internal shoe cleaner"? My wife and I have "inside shoes" (not really slippers) with a small shoe rack / bench next to the door, but we're trying also to get slippers for the guests because so many of them usually ask if they should remove their shoes when they see us doing it. I'm having issues choosing the right slippers because I don't want that using a slipper that many other people have used becomes a hygiene issue. I know that in most cases it's not, but I don't want guest to "feel" like it may be. How do you deal with that?