Questionable, possibly nationalistic waitstaff. Waitress was amazingly friendly to my Canadian friends/colleagues (granted, they go there all the time). I asked for a napkin and she seemed entirely displeased that I had requested one. It was like she smelled the American on me.
Perhaps post-election, we'll start getting a friendlier reception when traveling abroad? One can only hope.
Seriously tho - really good food, good environment, mostly friendly waitstaff and huge beer selection.