Black adapted by converting his outlets to short-order luncheonettes. He had them installed in stores, luncheonettes, social clubs and after-hours establishments. They are noted for their coffee shops, internet facilities, restaurants, luncheonettes, shops, and movie theaters. Luncheonettes Inc. The new subsidiary maintained its offices at 110 East 13th Street. Diner lingo was most popular in diners and luncheonettes from the 1920s to the 1970s.