EXHIBIT 21 SUBSIDIARIES OF FLAGSTAR COMPANIES, INC. NAME STATE OF INCORPORATION Flagstar Corporation Delaware TWS Funding, Inc. Delaware Denny's Holdings, Inc. New York Spartan Holdings, Inc. New York AMS Holdings, Inc. New York Canteen Holdings, Inc. New York TWS 800 Corp. Delaware TWS 300 Corp. Delaware TWS 500 Corp. Delaware TWS 600 Corp. Delaware TWS 700 Corp. Delaware TWS 200 Corp. Delaware El Pollo Loco, Inc. Delaware Portiontrol Food, Inc. Texas Denny's, Inc. California DFO, Inc. Delaware Denny's Realty, Inc. Delaware Quincy's Restaurant, Inc. Alabama Flagstar Enterprises, Inc.* Alabama Spartan Realty, Inc. Delaware Flagstar Systems, Inc. Delaware Spartan Management, Inc. Delaware Quincy's Realty, Inc. Alabama Spardee's Realty, Inc. Alabama La Mirada Enterprises No. 1, Inc. Texas La Mirada Enterprises #5, Inc. Wisconsin La Mirada Enterprises #6, Inc. Wisconsin La Mirada Enterprises #7, Inc. Wisconsin La Mirada Enterprises #8, Inc. Wisconsin La Mirada Enterprises #9, Inc. Wisconsin Denny's, Inc. Charitable Fund California Denny's of Canada, Ltd. British Columbia Denny's Restaurants of Canada, Ltd. Federal (Canada) * Flagstar Enterprises, Inc. of Delaware is an assumed name for use only in Ohio.