Exhibit 99.1 Investor Contact: Ken Jones 864-597-8658 Media Contact: Debbie Atkins NEWS RELEASE 864-597-8361 DENNY'S REPORTS JULY SAME-STORE SALES Spartanburg, S.C., August 6, 2004 - Denny's Corporation (OTCBB:DNYY) today reported same-store sales for its company-owned Denny's restaurants during the four-week period ended July 28, 2004, compared with the related period in fiscal year 2003. Four Weeks Sales: July 2004 --------------------------------- ----------- Same-Store Sales 9.1% Guest Check Average 3.3% Guest Counts 5.6% Restaurant Counts: 7/28/04 12/31/03 --------------------------------- ----------- ------------ Company-owned 554 561 Franchised and 1,062 1,077 ----------- ------------ 1,616 1,638 Denny's is America's largest full-service family restaurant chain, consisting of 554 company-owned units and 1,062 franchised and licensed units, with operations in the United States, Canada, Costa Rica, Guam, Mexico, New Zealand and Puerto Rico. For further information on Denny's, including news releases, links to SEC filings and other financial information, please visit our website at www.dennys.com.