A universal truth is that all food tastes better outside. What other reason could explain the hygienically sketchy yet ubiquitously successful New York City hotdog cart? The two weeks my wife and I recently spent in Provence and Paris further proved this maxim as we ate all but six meals outside, and even if we were seated inside, floor-to-ceiling windows, often wide open, brought outside elements in and made the atmospheres complement the aliments. Even when the temps in Paris soared to 108.7 degrees, the café culture was undaunted — sidewalk tables along every street still packed with people sipping their Aperol Spritzes and condensing glasses of rosé...