McMenamin's Corvallis Pub has friendly, helpful staff who are attentive without smothering you. They're knowledgeable about dish ingredients and able to assist with questions regarding gluten and other common dietary offenders.
Great selection of drinks on tap in addition to a full bar. The soups are good and I haven't yet had a menu item disappoint me. The tots are excellent, especially with their seasoning.
If you're going to be in the area a while, potentially trying other locations, ask about the McMenamin's Passport.