The most reliable benchmark is to think in glasses per guest and in actual hours of service. For an event lasting two to three hours, plan for around 2 to 3 cocktails per person. For a longer evening with dinner, music and dancing, the average can rise to 3 or 4 drinks, especially when the bar becomes the main meeting point of the reception.
A group of 80 guests over three hours therefore represents a realistic base of 180 to 240 cocktails. This is not a drinking target but a preparation allowance. It helps anticipate ingredients, ice, glassware, production pace and the number of bartenders. The calculation is not designed to encourage consumption : It simply keeps the service flowing.
An event cocktail bar is not used in the same way at a wedding, seminar or private party. During a wedding cocktail hour, guests often arrive together, spend time talking and then move on to dinner. The service peak is intense but short. At a corporate party, demand is more spread out : A welcome drink, a second glass during conversations and sometimes a final drink at the end of the programme.
When booking a wedding bartender, the menu must also reflect each moment : Guest arrival, cocktail hour, dinner, the first dance and the end of the evening. Signature cocktails that guests photograph and talk about move quickly at the beginning, then tastes become more evenly distributed. The event format shapes the rhythm of the bar. This is why a simple ratio is never enough without understanding the schedule.
A long menu can be tempting. In event bartending, it is rarely a good idea. The wider the menu, the slower the service : More ingredients, more steps and more hesitation in front of the bar. For 50 to 150 guests, a balanced menu usually contains 3 to 5 recipes at most, including at least one alcohol-free creation developed to the same standard as the others.
A good menu feels like a well-planned conversation : A fresh citrus-led cocktail, a rounder recipe, a signature creation linked to the event, a premium mocktail and perhaps a more theatrical option when flair bartending is included. Freshly pressed citrus, a herbal note, a foamy texture, a frosted glass : These details create a sense of choice without making production unnecessarily complex.
Alcohol-free drinks should no longer be treated as a safety margin. In 2026, they belong at the heart of the menu. Drivers, pregnant guests, people who drink little and employees attending a daytime corporate event all want to enjoy the bar without alcohol. A sensible calculation reserves 20 to 30% of the total volume for premium mocktails, and sometimes more for a daytime business event.
A serious mocktail is not simply fruit juice. Cold infusion, yuzu shrub, aromatic tonic, ginger kombucha or a house syrup made with fresh herbs : The recipe should offer the same visual and flavour experience as a classic cocktail. Everyone should be able to raise an elegant glass. It also reflects well on the organiser.
The number of cocktails is only part of the equation. The real issue is throughput. One bartender can prepare a large number of drinks over a long evening, but will quickly become overwhelmed if 120 guests reach the bar at the same time. The professional benchmark remains simple : One bartender for 60 to 70 guests, with no bottlenecks. Below that ratio, service is comfortable. Above it, waiting times become visible.
For a mobile bar at a garden party or product launch, the installation matters as much as the team : Water access, storage space, circulation in front of the counter, ice reserves and a glassware area. A well-designed station removes unnecessary movements and keeps the bartender facing the guests. This is where a truly premium service becomes clear.
For a complete cocktail bar service, established providers generally charge between €9 and €13 excluding VAT per cocktail served, all included : Bartender, equipment, ingredients, ice, preparation and logistics. Below €9 excluding VAT, examine what has been removed from the quote : The quality of the spirits, freshness of the juices, glassware, service time, number of bartenders or level of preparation.
For 100 guests on a base of 3 cocktails per person, the reference volume is around 300 cocktails. At €9 to €13 excluding VAT per glass, the budget is therefore between €2,700 and €3,900 excluding VAT, depending on personalisation, venue, duration and options. A cocktail workshop, flair show or developed signature menu may change that figure. A clear quote should explain exactly what is included.
