Supper club staples live and die by the details. Bitters, simple syrup, sweet and sour mix, a splash of soda, and a jar of good cherries are what turn a simple pour of brandy into an actual Old Fashioned. Don’t overlook the orange slice, either — muddled in or perched on the rim, it’s a supper club signature. A well-stocked bar also means keeping citrus, simple syrup, and quality bitters on hand at all times, since these small touches are what separate a passable cocktail from a true supper club experience. Stock a few quality modifiers and garnishes and you’ll be able to build a proper round for guests without a single trip to the store.