I used to travel quite a bit fo the sake of my job and always made it a point to sample what the local brewpubs had to offer. Two stand out in my mind. First is the Hazel Dell Brewery in or near Portland. The first night I was there, they had an amber which was OK call Red Zone, kinda on the hoppy side. The next night I showed up they had the same beer but pumped with nitrogen instead of CO2 and they called it Red Nite. It was the most awesome taste experience I have ever had. The nitrogen really toned down the hops. I have been looking for nitrogen amber ever since. I am somewhat envious of those who live in the Portland area for their many and varied choices of Brewpubs.
The other place that stands out was in Cinncinati at the Drawbridge Inn, which contains the Oldenberg Brewery, or maybe the Brewery contained the Inn. Anyway, the beer was not that memorable but just the experience of being able to stay within staggering distance of your hotel room while sampling some decent brew was quite nice.