Last fall, a tiny sign appeared along Highway 1 whose name would likely be a mystery to all but the most discerning cocktail aficionados: King Floyd’s. The sign points up the driveway to the former Point Reyes Vineyards, directing delivery drivers to a large green warehouse overlooking Tomales Bay. 

Inside, a small team produces and packages an array of award-winning cocktail bitters made from carefully sourced organic ingredients, each bottle with a mysterious figure…