American Furniture Warehouse is a multi-store furniture retailer based in Denver, Colorado, with 10 regional warehouse store, each with at least 100,000 square feet of showroom space. The crowning glory of the empire is a new showroom-warehouse complex of almost science fictional dimensions -- 635,000 square feet on 17 acres, a building about a quarter-mile long -- in the still largely undeveloped prairies near C-470. As reflected in its assets, the company does serious business. In 1979, American Furniture Warehouse did $17 million. More recently, sales have topped $300 million.