Often I will need to stop at the grocery store for a few items on my way home from work. Since I prefer the power and efficiency of cleated shoes on the long commute, that leaves me clacking and skidding around the hard floor like a deer on a frozen pond.The other day I devised this quickie cleat cover. I cut pieces of a discarded foldable road tire. I punched holes in it and laced pieces of shoelace through them. The covers lie flat in the rack pack on the bike so they don't take up too much space.
When I need to cover the cleats I just tie the strips of tire around my shoe.
It seems to work. And the pieces are long enough that I may try rotating them and modifying the lacing to cover the cleat and the heel of the shoe.