Outside the corner bar in Allison hangs a big sign, “Coldest & Cheapest Beer.” Now who can reasonably drive by and not be lured in by such a bold claim? Certainly not the Iowa Roadie (who, truth be told, does not even drink beer). But “coldest & cheapest beer” reminded me of that scene in the movie Elf, where Will Ferrell drinks “the world’s best coffee” from some misfit little diner in NYC. And even if I don’t like beer, I love Elf. Which means that if this were one of those bizarre “six degrees of separation” situations, I was meant to stop in. (That… and the fact that my husband was thirsty and DOES like cold and cheap beer.) Accompanying my husband and me to Gronigans were friends husband T & wife M. (Quick side note: This is the couple that years ago introduced us to the concept of…