EXHIBIT 21 SUBSIDIARIES OF FLAGSTAR COMPANIES, INC. NAME STATE OF INCORPORATION Flagstar Corporation Delaware TWS Funding, Inc. Delaware Denny's Holdings, Inc. New York FRD Acquisition Co. Delaware FRI-J Corporation Delaware Far West Concepts Delaware FRI-M Corporation Delaware FRI-NA Corporation Delaware FRI-C Corporation Delaware Spartan Holdings, Inc. New York Canteen Holdings, Inc. New York TWS 800 Corp. Delaware TWS 500 Corp. Delaware TWS 600 Corp. Delaware TWS 700 Corp. Delaware El Pollo Loco, Inc. Delaware 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 Quincy's Realty, Inc. Alabama Spardee's Realty, Inc. Alabama * Flagstar Enterprises, Inc. of Delaware is an assumed name for use only in Ohio.