Self-Service Laundry on Maryland Ave. in Annapolis, Maryland has been around for over 40 years. Nestled on a street full of antique, coffee, and art shops it adds a touch of whimsicality and blends perfectly with the town culture.  According to Laundromat Facts on Mr. Smarty Pants, the first unattended, 24-hour self-service laundromat in the United States was opened by Nelson Puett in 1949 on North Loop in Austin, Texas.