The traditional club sandwich is a double-decker sandwich on white toast. It has chicken, bacon, lettuce and tomato, and maybe cheese. Ideally, it is cut in fourths and served with a frilly toothpick in each section.
But what about variations on the theme? If I have a single-decker sandwich of chicken, bacon, lettuce and tomato on white toast, is it a club? What if I have a double-decker sandwich, served on white toast, cut in fourths, served with frilly toothpicks, but instead of chicken, it has roast beef? What if there's avocado on it? What if the chef substitutes ham for bacon?
At heart, I am a club sandwich purist. My ideal club looks like the one described in Professional Cooking by Wayne Gisslin. (see page 743.)
As I conduct my personal club sandwich tour, I won't rule out the variations, but I'll always be searing for the club sandwich that most closely approaches my Platonic club sandwich ideal.