More and more people who have grown weary of long U.S. Postal Service lines are turning to an alternative: small, storefront operations that offer many of the services of a regular post office. This fast-growing industry now consists of several thousand shops across the U.S., some of them members of private "post-office" chains. Typically, these stores accept packages for customers at locations that are more convenient than the outlets of traditional shipping companies like the United Parcel Service. And unlike U.P.S., the private post offices often sell stamps, rent P.O. boxes and even help customers wrap packages.
The industry leader is...