I was at Millers Pub in downtown Chicago last night. They have a rotating tap for a couple local places and I asked what Solemn Oath they had. Her reply was: "hexafoos, it's kind if a hoppy citrus beer." I ordered it with the assumption that it was not in fact a citrus beer. It turned out to be a delicious saison, true to style and well done. I really wish restaurants would educate their staff better.
They probably just figure their customers will look up the beers on their smartphones anyway.