Since bowling alleys have special expensive wood, going outside wearing bowling shoes can pick up small pieces of dirt or grit that can scratch the wood. How long does it take to take them off and put on regular shoes? Most alleys already have signs not to walk outside wearing bowling shoes.
Agreed, but most people know that and if they did go elsewhere, would buff up their shoes prior to hitting the alleys again. Not perfect, but no one wants to have their skid ruined by pebbles on the shoe.