There's a second Denny's in Oakville. It's 24 hours and attached to the Sandman hotel. You won't find prices like you find at Denny's in the USA. But you'll find a decent, clean restaurant with many of your favorites. Didn't notice Moons Over My Hammy on the menu but you'll find the country fried steak and grand slam breakfasts.
All n all not a bad place to grab a quick, familiar meal before taking in a flick at the nearby Cineplex.