Denny's 3170 Harbor Blvd 7:00 AM - 10:00 PM 7:00 AM - 10:00 PM 7:00 AM - 10:00 PM 7:00 AM - 10:00 PM 7:00 AM - 11:00 PM 7:00 AM - 11:00 PM 7:00 AM - 10:00 PM3170 Harbor Blvd Costa Mesa, CA 92626 US