I'm kind of a foodie, and our project manager is definitely a foodie. He runs this site that lists some great places to eat and drink if you're only in a city for a couple days. Here are his picks for Portland: http://noms.in/portland
I've seen very few places here that categorize themselves as gastropubs. There are a lot of breweries in Portland, and some of them have their own restaurants/pubs. But's that's a relatively small percentage of the diverse dining options here.