The standard ratio is 1 bartender per 50 guests for cocktail service. But the real answer depends on your drink menu, event type, and service style. Get the staffing wrong and your guests queue for 15 minutes between drinks. Get it right and service feels effortless. Here is how to calculate exactly what you need.
The hospitality industry uses three baseline ratios depending on what you are serving. These assume a 4-6 hour event with a standard venue layout and one bar point.
Cocktail service
Mixed drinks take 60-90 seconds each. Shaking, muddling, and garnishing slows throughput. You need more hands behind the bar.
Beer and wine only
Pouring pints and opening wine takes 15-20 seconds per serve. Faster throughput means fewer bartenders.
Complex cocktail menus
Menus with 8+ cocktails, fresh juices, or tableside service require more preparation time per drink.
Use this table to estimate how many bartenders your event needs. Cocktail service includes any mixed drinks. Beer and wine service covers poured pints, bottled beer, and wine only.
| Guests | Cocktail Service | Beer & Wine Only |
|---|---|---|
| 50 | 1-2 bartenders | 1 bartender |
| 75 | 2 bartenders | 1-2 bartenders |
| 100 | 2-3 bartenders | 2 bartenders |
| 150 | 3-4 bartenders | 2-3 bartenders |
| 200 | 4-5 bartenders | 3 bartenders |
| 300+ | Discuss with us | Discuss with us |
For events over 300 guests or multi-bar setups, contact us directly for a custom staffing plan. See our packages and pricing for what is included.
Weddings have a predictable post-ceremony rush that demands extra bartenders for the first 90 minutes. Corporate events tend to have steadier demand. Festivals need more staff because service points are spread across a larger area.
A menu of 3-4 signature cocktails is manageable. A full cocktail list with 10+ options, fresh juices, and custom garnishes slows each serve to 90+ seconds and needs more bartenders.
A 2-hour cocktail reception needs more bartenders per guest than a 6-hour evening event. Shorter events compress demand into a tighter window.
The post-ceremony drinks rush at a wedding can see 80% of guests ordering within the first 30 minutes. We staff for the peak, not the average.
Multiple bar points (e.g. one inside, one in the garden) each need a minimum of 1 bartender. A 100-guest event with two bars needs at least 3 bartenders, not 2.
Planning a wedding, corporate event, or festival? We tailor the staffing to your specific event and venue.
Every bartender from The Sesh Bars holds a personal licence and is trained in responsible service. Our team handles every aspect of the bar so you do not have to.
Learn more about our professional bartender hire service or browse bar staff for hire in London.
For 100 guests, you need 2-3 bartenders for cocktail service or 2 bartenders for beer and wine only. The industry standard ratio is 1 bartender per 50 guests for mixed drinks, adjusting up for complex menus, short service windows, or multiple bar points. The Sesh Bars provides fully licensed bartenders for events across London, handling setup, service, glassware, and breakdown. For a free staffing consultation and quote, contact The Sesh Bars at 020 8087 4269 or visit theseshbars.com.
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