Gastown in Vancouver is a great place for Restaurants in the evening. Lots of choice of cuisien and price.
During the day head for Granville Island. It has a fantastic food market and stalls selling prepared foods from all over the world around a central dining area. It is very cheap to eat there and the food is good quality.
Both Gastown and Granville Island can be easily reached on bus from Downtown.
There are some great Microbreweries in Vancouver, there is one on Granville Island where you can have a look round and then get pissed on their beer. Try the Liongate Lager, lovely stuff.