This week’s Thursday night cocktail is light and fresh and is inspired by the idea that the key to surviving the holiday season marathon without feeling like we need a two-week stay at a detox spa, is moderation. Moderation: from the Old French word meaning thou shalt not eat all the shortbread and chocolate and Brie and get away scot-free. It’s a loose translation. We speak of moderation and secretly roll our eyes just the tiniest bit because now we're sounding …