This place is old school. Some people have imitated, others have even improved it a little. But Marven's is a staple to the Montreal food scene. Still the best calamari in town. The homemade cheesecake is amazing but beware, they often run out. Special mention for the steak and the Marven's sauce. The service is usually friendly and quick. Basically, Marven's is the equivalent of Napoletana but for greek food, which means it's delicious and always packed.
I am awarding 5 stars, not because of the quality. In fact, there is some outstanding greek food in Montreal. The 5 stars is for the wonderful Montreal feeling you get when you are seated at one of their tables.
It's cash only, but they have am ATM. Enjoy!