The Old Library has tried and tested a few genres of booze ‘n’ food or food ‘n’ booze places for many years. Smack bang in the middle of Cardiff city centre it shouldn’t be a place easily missed but it is easy to do so. We found a quiet haven of warmth when it was raining horizontally outside. The entire population of the world was Christmas shopping but the airy and spacious restaurant was welcoming and relaxing (despite us having…