Well, Hap's is on the top of this list.
Duh. We bought Hap's when I was 10. I'm 43. Sorry, but other than Crowley's, where we used to gather for the stealing of the statue (and the kids were left to roam Mt. Adams and get dog poop on their shoes), Hap's is the oldest, most authentic place left in town. If you don't know about the stealing of the statue, well, you're just a poser.
Cead Mille Failte, and Erin Go Braugh, or for the ridiculously authentic, "Éirinn go brách."
Oh Yes, Happy Anniversary, Linda and John Rathbone!