Exhibit 99.1 Investor Contact: Ken Jones 864-597-8658 Media Contact: Debbie Atkins NEWS RELEASE 864-597-8361 DENNY'S REPORTS SEPTEMBER SAME-STORE SALES Spartanburg, S.C., October 7, 2004 - Denny's Corporation (OTCBB:DNYY) today reported same-store sales for its company-owned Denny's restaurants during the five-week period and quarter ended September 29, 2004, compared with the related periods in fiscal year 2003. Five Weeks 13 Weeks Sales: September 2004 Q3-2004 ------------------------------- ------------------ ------------- Same-Store Sales 7.0% 6.8% Guest Check Average 4.6% 3.8% Guest Counts 2.3% 2.9% Restaurant Counts: 9/29/04 12/31/03 ------------------------------ ------------------ ------------- Company-owned 553 561 Franchised and Licensed 1,056 1,077 ------------------ ------------- 1,609 1,638 Denny's is America's largest full-service family restaurant chain, consisting of 553 company-owned units and 1,056 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.