What should I do in Vancouver for 4 hours?

I will have about 4 hours in Vancouver, morning until about 2:00pm. We are catching a cruise, and we cannot board until noontime (lastest I want to board is 2:30) and I am pretty sure we will be up at the crack of dawn because of the time change.

I have been to Vancouver before, many many years ago, and loved it. I have been to Stanley Park, and walked around the city, but I barely remember everything we did.

I am considering doing a hop on hop off bus, what do you think? Where would you recommend I get off for a late breakfast or early lunch?

Is Grandville Island interesting and fun?

If I go back to Stanley park, where should I go within the park?

Can we tour Olympic Park? Is that interesting?

I don’t want to just walk aimlessly through the city, I want to pick one thing, check it out, and then get back to the port. My husband is inclined to wait around, get on ship as early as they will us on, and just wait to set sail, so I need to be prepared for what I want to do.

Any other suggestions are appreciated.