It would probably be the 23rd, because I have a thing Sunday afternoon that I cannot get out of, and if I'm planning this, I want to go to it.

I was thinking Waterfront Park or either of the Park Blocks, but since it is Oregon, someplace indoors (even as a backup plan) would be a good idea. I thought about the Central Library for that same reason, but like you said, we'd have to be quiet. I like the art museum, but I'm worried about cost. PSU maybe?

Maybe I'm just overthinking this... But thanks for the suggestions! I'm completely at a loss right now, so everything's helpful.