If you are hosting a shoeless party and a guest arrives who is wearing a very nice pair of shoes or a pair of shoes you know to be new, always complement them. That way, they will not mind so much leaving them at the door.
This blog recommends that you adopt a shoes-off policy in your home, not just for family but also for guests and other visitors. Socks, slippers and bare feet are fine indoors, but not shoes. Just say NO to shoes in your house!