Karsen's grill is a great venue in Old Town to escape from the tourist vibe. It has that nice dive appeal dim lighting, generous pours, and a friendly atmosphere. Menu is pretty extensive for such a small bar. They have daily specials and plenty of comfort food on their menu. I had their meatloaf special and it was a very generous portion and very reasonably priced.
Be aware that if you are anti-social then this is not the place for you as conversation amongst the patrons is bountiful ;^). Karsen's Grill is definitely on my return to list when I'm I return to PHX!