Kojax has alot of history with me and has saved me from many a hangover when in Montreal. Their food has kept me fueled between bohemian Bar Hopping nights chasing French Canadian Women.
The souvlakis here are nowhere near the quality of say Arahova or Villa, but Kojax fills a niche of providing really fast Greek food with the emphasis on fast, to keep you fueled between bars or after a late weekday night out when you need to get to bed. In most other major Cities I think your only other alternative would be picking up a Pizza Slice or hotdog. I like the sweet sauce on mine when still hitting the town in consideration of breath. At the end of the night I'll take mixture of garlic and aforementioned hot sauce.