Planning Guides
How Many Bartenders Do I Need for 100 Guests?
A simple ratio to plan around, plus a full breakdown by guest count so your bar never falls behind.
5 min read
The Quick Answer
For 100 guests, plan on 2 bartenders and consider adding a barback, especially if you're running an open bar.
The General Rule of Thumb
A single experienced bartender can comfortably serve 50–75 guests before service starts to slow down. Past that point, guests begin waiting in line, which is the fastest way to make an open bar feel understaffed — even if the bartender is working hard.
Use this simple ratio: 1 bartender per 50–75 guests, adjusted up or down based on the factors below.
Guest Count Breakdown
| Guest Count | Recommended Bar Team |
|---|---|
| Up to 50 guests | 1 bartender |
| 50–75 guests | 2 bartenders (a barback may help if the event is busy or cocktail-heavy) |
| 75–150 guests | 2 bartenders + 1 barback |
| 150–250 guests | 3 bartenders + 1–2 barbacks |
| 250+ guests | 4+ bartenders + barback team |
What Can Push You to the Higher End
- Open bar service — guests order more often than at a cash or limited bar.
- A signature cocktail menu — custom drinks take longer to make than pouring beer or wine.
- A single, high-traffic bar station — spreading guests across multiple stations reduces pressure on any one bar.
- A tight service window — cocktail hour with a hard 60-minute limit needs more hands than a slow-paced evening.
What Can Let You Staff Lighter
- Beer and wine only, no mixed drinks
- Multiple bar stations spreading out the crowd
- A longer event where guests trickle to the bar over time
When (and Why) You Need a Barback
As a general guide, consider adding a barback at around 75 or more guests. For cocktail-heavy or very busy events, one may help from around 50 guests.
A few other signals point to needing a barback:
- A cocktail-heavy menu, not just beer and wine
- High-volume peak moments — right after guests arrive, during toasts, or when the dance floor opens
- Longer events, where inventory and cleanup pile up over time
- Presentation-focused events like weddings or corporate functions, where a cluttered bar stands out
- Wanting your bartender to stay guest-facing instead of stepping away to restock
A barback's job is mostly invisible when it's working: prepping garnishes, restocking ingredients, keeping tools and stations organized, and rotating ice and glassware — all so your bartender never has to pause service to do it themselves.
Putting It Into Practice
When you post your event on Updone, include your guest count and bar style (open bar, limited, cash bar) — bartenders will size their offers accordingly, and you can request an additional bartender or barback right from the same posting.