There is a recipe I'm dying to try for Carbonnade Flamande that calls for Flemish sour ale. While I haven't looked at the store yet, I doubt they have it. I'm in Texas and the beer aisle is mostly the standard IPAs where I live.
Would using a regular ale (I'm sure they have a few) completely change the taste of the recipe? What are the flavor notes of sour ale? Could I just add a little vinegar to make a plain ale work?