Portland is the greatest city for Microbrew lovers! Since the '80's, PDX has sprung more great micorbreweries than any other city in the world.
My tip is to try the Lucky Labrador on SE 9th & Hawthorne for a great array brews in a rustic warehouse. Snack on peanuts, have a tasty sandwich or an asian bento. Better yet, bring your dog with you as they are welcome in the outside seating. It's my favorite spot!
Only down side is that familes are bringing their young kids to the pub, making for a loud scene.
Another suggestion would be to take your time and try a new pub each week. It will take you most of the year to get to all of them in the PDX area. You'll find some that you really like, some that you won't, but it will be worth it!
Keywords: Dress casual, Outdoor / Patio seating, Loud, Take out / Delivery, Everyone, No smoking, Pub / Brewery / Beer Garden, Dinner, Moderate (US$ 11 - US$ 20), "In" place / People watching, Lunch