Granville...the public market has hours, but the place is just a place. There's a hotel there and restaurants, etc.
And it's not an island.

Seems like it from downtown Vancouver, but from further south it's just an outjutting of land. You can take cute little tiny boats, you can walk (long walk across big scary bridge from downtown), you can drive onto it. Not something I would include in a tour, especially just one hour long, but others did cover that already.
DH likes visiting Chinatown type places, but he avoids the Vancouver one. Most of the Asian businesses, I have read, moved out of the chinatown area so there's not much there, it seems. Gastown, like was said, is a couple blocks. There's a Spaghetti Factory restaurant there. If you've been to one in the States it's similar but also different, menu-wise.
Our fave for dinner, honestly, is the Red Robin on Robson. It's upstairs but there IS an elevator to get up there.
Or we go to one of the crepe places around.