When I work late nights at work, I'll drop by Harry's.
I'm unsure of their hours, but I usually reach here around 9:30ish and they are still open.
Super cheap burgers, with one of the best poutines I've ever had! And the poutine is in a huge take out box, it's enough for 2 or 3 people! Totally worth the money!
Cash only.
A must try!