Exhibit 99.1 Investor Contact: Alex Lewis 877-784-7167 Media Contact: Debbie Atkins NEWS RELEASE 864-597-8361 DENNY'S REPORTS SEPTEMBER SAME-STORE SALES Spartanburg, S.C., October 6, 2005 - Denny's Corporation (Nasdaq:DENN) today reported same-store sales for its company-owned Denny's restaurants during the five-week month ended September 28, 2005 compared with the related period in fiscal year 2004. Sales: Sept. 2005 3Q 2005 YTD 2005 -------------------------- -------------- -------------- -------------- Same-Store Sales 1.0% 1.5% 3.9% Guest Check Average 3.7% 4.1% 4.1% Guest Counts (2.6%) (2.5%) (0.2%) Restaurant Counts: 9/28/05 12/29/04 -------------------------- -------------- -------------- Company-owned 546 553 Franchised and Licensed 1,036 1,050 -------------- -------------- 1,582 1,603 Denny's is America's largest full-service family restaurant chain, consisting of 546 company-owned units and 1,036 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.