<p><strong>Noun</strong></p><ul><li>plural: barrelhouses.</li><li>a cheap saloon, especially one in New Orleans in the early part of the 20th century; so called from the racks of liquor barrels originally placed along the walls.</li><li>a vigorous style of jazz originating in the barrelhouses of New Orleans in the early part of the 20th century.</li></ul>