Supply and Demand by O. Henry — Read

Finch keeps a hats-cleaned-by-electricity-while-you-wait establishment, nine feet by twelve, in Third Avenue. Once a customer, you are always his. I do not know his secret process, but every four days your hat needs to be cleaned again.

Finch is a leathern, sallow, slow-footed man, between twenty and forty. You would say he had been brought up a bushelman in Essex Street. When business is slack he likes to talk, so I had my hat cleaned even oftener than it deserved, hoping Finch might let me into some of the secrets of the sweatshops.