I really love Bar Raval; it is one of my favourite spots in Toronto.
Interior is very beautiful; it is a stand-up bar, and there are very limited bar chairs if you can get one. Ambiance is very causal; music is a little loud. The place is small, and it is very intimate (because you either need to shout loud to talk to your friend or speak in your friend's ear).
Food is amazing; menu changes regularly, but some of the signature items remain on the menu. My favorite is the hot octopus; it is so flavourful and tender. The canned seafood is the must try item as well. During the morning/early afternoon, dishes/pastry will be displayed at the bar table and you can just choose and bring back to your table.
Service is very friendly; you can feel they love their job and love you to be there. I feel being welcome during my every visit.