The Coup!! It's on 17th Avenue, just on the south side of downtown and it's a fantastic vegetarian restaurant that is always crazy busy because the food is so amazing. They also have an attached lounge called Meet where you can just go for drinks and appetizers or have drinks / appetizers while you wait for your table. Like I said it's vegetarian not vegan, but pretty much is super easy to veganize.
The area where this restaurant is is also a pretty trendy shopping district worth checking out. We have tons of beautiful parks and walking paths to check out and everything is super green & colourful right now from our very wet spring!