Buying the Bar: What Runs Out at Nine and What You Will Still Have in March

People shop for a party by buying interesting bottles and then run out of ice, tonic and limes by half past nine. The expensive decisions were all made correctly and the cheap ones were not made at all, which is exactly the wrong way round.

The useful frame is not what to buy. It is which items are consumed in proportion to guests and which are not, because those two categories behave completely differently and almost everybody gets the ratio backwards.

The things that scale with headcount, and always run out

Ice is first and it is not close. A party with drinks needs about a pound and a half per guest, more in summer, and it is used for chilling as well as for glasses. Twenty guests is thirty pounds, which is three large bags, which will not fit in a domestic freezer next to anything else.

Mixers are second. Tonic, soda, ginger beer. A drink takes four to six ounces of the stuff, so seventy drinks is close to nine liters of mixer, and that is a great deal more than the two large bottles most people bring home. Buy small bottles rather than large ones, because an opened large bottle goes flat before you finish it.

Citrus is third and it is the one people most underestimate. A lime yields half an ounce to an ounce and a quarter depending on the fruit, so a recipe calling for one lime per drink means twice as much fruit as the arithmetic says. Buy forty percent more than you calculate, and buy extra for peel, since garnish citrus and juice citrus are two separate purchases.

And clean glasses, which nobody thinks of as a consumable and absolutely is. Budget one and a half glasses per guest or you will be washing during your own party.

The things that do not scale, and that you will still have

Spirits. This is the surprising one. A seven hundred and fifty milliliter bottle gives about sixteen drinks at an ounce and a half, so a party of twenty drinking seventy drinks total, with two thirds of those being spirit-based, needs roughly three bottles across the whole evening. Most people buy six and open four.

Bitters last years. Syrup lasts months if it is made at two to one. An unopened bottle of anything shelf-stable is a purchase you can undo, and most shops will take it back.

The exception, and it is an important one, is vermouth. Vermouth is wine. It oxidizes, it belongs in the refrigerator once opened, and it is finished as a useful ingredient after about a month. Buy the small bottle, every time, however poor the value looks on the shelf.

So the buying rule inverts what people do

Overbuy the cheap perishables. Underbuy the expensive shelf-stable ones.

An extra three bags of ice, an extra case of mixer and an extra bag of limes costs perhaps twenty-five dollars, and the leftovers are ice, which melts, and mixer, which keeps. An extra two bottles of spirits costs four times that and sits in a cupboard until Christmas.

The one thing worth overbuying at the expensive end is whatever the zero-proof option is, because that is the category people run short on and the shortage is the most visible. Running out of gin at ten is a shrug. Running out of the good non-alcoholic thing at nine, and then offering somebody a can from the back of the fridge, is a demotion in front of a room, which is the exact failure the whole plan was meant to avoid.

Most guests drink two or three things, so stop stocking for all of them

Watch any party and the distribution is brutal. Almost everyone converges on a small number of options, usually whatever is easy, whatever is cold, and whatever the host is drinking.

So a station with five well-supplied options outperforms one with twelve thinly supplied ones, and it outperforms it by a wide margin, because the twelve-option station runs out of the three that people wanted while holding plenty of the nine they did not.

Pick two spirits, not five. Pick one wine of each color rather than a range. Pick one excellent zero-proof build and buy deep on it. Then spend the money you saved on ice and mixer, which is where the party will actually be won or lost.

The shopping list, in the order it should be written

Ice, in a quantity that seems ridiculous. Mixers, in small bottles, about twenty percent more than the arithmetic. Citrus, forty percent more, split between juicing and peel. The zero-proof components, bought deep. Then two or three spirits and the wine. Then bitters and syrup if you do not have them.

Written in that order, the things that run out get bought first and the things that keep get bought last, with whatever budget is left. Written in the usual order, you spend eighty percent of the money in the first aisle and improvise the rest.

Part of Drinks & Zero-Proof.