The Diner on Medication
RSM UK published research this month from a survey of 2,000 consumers, looking at how GLP-1 weight-loss medications are reshaping spending habits. The headline figures are not alarming in isolation. They are worth sitting with.
Six percent of UK adults are now taking a GLP-1 drug. Ozempic, Wegovy, Mounjaro. That proportion has nearly doubled in nine months, from around three percent in June 2025. At current usage rates, a table of eight on a busy Friday evening includes, on average, someone on a medication that changes how much they eat and drink.
Of those users, almost a third drink less alcohol. More than a quarter eat out or get takeaway less frequently. Nearly half eat smaller portions when they do sit down.
A new kind of pressure
The cost story the industry has been living for two years is a supply-side one. VAT at twenty percent. The April wage floor. Business rates revalued upward in the spring. Food inflation heading toward nine percent. All of it lands before the kitchen reaches any margin.
This is different. It is a demand-side shift: the diner changing, without announcement, in a direction that affects what a table earns.
The RSM data, published this July, sits alongside a restaurantonline.co.uk forecast that GLP-1 medications will reduce out-of-home food and drink spending by close to a billion pounds by 2031. That is five years out and a projection, not a bill. But the direction is clear, and usage is growing faster than anyone modelled a year ago.
What it means for the bar
The part worth focusing on is the alcohol.
Hospitality economics run through the bar. The kitchen brings people in. The drinks margin is where fixed costs actually get covered: rent, rates, the rota, the energy draw. A plate of food taxed at twenty percent before it reaches margin does not carry a service on its own. The bar does.
A third of GLP-1 users drinking less alcohol is not a lifestyle feature. It is a margin question. A growing demographic ordering less from the list that pays for the kitchen being open is a change in the economics of a table, one that compounds as usage grows. The sector has been watching costs rise on every supply-side line for two years. This one arrives from the other direction, in the diner themselves, and it is quiet enough that most operators have not named it yet.
What the drinks list does next
The operator who has built a genuine no and low-alcohol range, priced as a serious category rather than a soft-drink substitute, is in a better position than one who has not.
The category has products that earn. A diner who orders a premium non-alcoholic drink at a proper price point is a different financial event from the same diner ordering tap water. Lucky Saint, Guinness 0.0, the growing range of non-alcoholic spirits: these are not afterthoughts. They are the answer to the question of what a third of your table does when they are not drinking wine. A list built to catch that diner earns something from the whole table. A list that has not moved in three years does not.
The chair it leaves
The empty seat is still the empty seat. The diner eating out less frequently leaves the same cold chair behind them regardless of what they are taking. Halfseat fills it: food at half price, drinks at full price, a real cut of the booking fee going directly to the venue. The kitchen has already prepped. The rota was already set. The question at 4pm is only whether the seat earns something before service ends, or earns nothing.
But the drinks list the Halfseat table orders from matters. The entire model runs on the bar margin staying intact. A list built to give the sober or near-sober diner something worth ordering is the one that earns from the whole cover, not just the half of it that opens a bottle.
The supply side has been demanding attention for two years. The demand side has been moving quietly. The drinks list is the first place it shows up in the numbers.