A neat idea to protect your guests feet?

I've read an idea that some couples provide their guests with optional flip flops, so that if their shoes start to hurt, they don't need to dance barefoot. Dancing barefoot, while it seems fun, is not always practical or safe in a large group (someone may drop a glass or something on the floor). While that is a nice idea, it can be expensive ... unless you buy the flip flops this Saturday from Old Navy (in Canada, anyway).


Just a thought :)