Vancouver has a very open and relaxed gay scene - just walk along Davie Street! One place that's hot and cool at the same time is Odyssey.
It's wild without being tacky and they have lots of fun theme nights that suit not just gays but welcome all people. It has one large room for drinking and dancing with go-go boys and the like. The outside patio is the place to smoke, chat and flirt!
Dress Code: Put some effort into it - everyone elso does it, so why shouldn't you?