Wine on Tap: Why Offices & Restaurants Are Switching

Wine on tap is quietly becoming the default at Bay Area restaurants, tasting rooms, and — increasingly — office break rooms. Instead of pulling corks all night, staff pour glass after glass from a keg, and every pour tastes as fresh as the first. Here's why offices and restaurants across San Francisco are making the switch, and what it takes to set up.

What "wine on tap" actually means

It's exactly what it sounds like: wine packaged in a stainless-steel keg rather than glass bottles, dispensed through a tap using inert gas instead of a hand pump. The wine is the same quality you'd get from a bottle — plenty of well-regarded producers keg their wine specifically for on-tap service. What changes is the packaging and the way it's served.

Because the wine never touches oxygen until it hits the glass, a keg stays fresh for weeks after it's tapped. That's the core difference from a bottle: once you open a bottle, the clock starts and the last glass is rarely as good as the first.

Why offices and restaurants are switching

Freshness, right down to the last glass

Wine kegs are pushed with an inert gas — typically nitrogen, a nitrogen/CO₂ blend, or argon — that shields the wine from air. Every glass in the keg pours as fresh as the first, which solves the by-the-glass problem that has frustrated restaurants forever: half-finished bottles going flat and dumped at close.

Less waste, lower footprint

A reusable steel keg replaces roughly two cases of bottles per fill, and the same keg can be refilled for years. Studies of kegged wine point to a dramatically lower carbon footprint versus single-use glass — no corks, no labels, no cardboard, no bottle recycling. For a sustainability-minded office or restaurant, that story matters.

Faster pours and easier inventory

No opener, no foil, no cork failures — just pull the tap. One keg is one line item to track instead of counting dozens of bottles, and consistent pour sizes make costing simpler. For a busy service or a Friday office happy hour, that speed adds up.

How much wine is in a keg?

The standard wine keg holds 19.5 liters — about 26 standard bottles, or roughly 130 five-ounce glasses. That's a lot of pours from a single vessel, which is part of why the format works so well for high-volume settings. If you're weighing keg formats in general, our companion guide on half barrel vs. sixtel keg sizes breaks down the trade-offs, and you can browse what's pourable now in Wine Kegs.

What you need to pour it

Wine on tap runs on the same basic hardware as beer: a kegerator or draft tower, a coupler that fits the keg, a gas tank and regulator, and a clean line. The main difference is the gas — many operators prefer nitrogen or argon over straight CO₂ so the wine doesn't pick up carbonation. If you already run beer on draft, adding a wine line is a small step.

We keep the full setup in stock — dispensers, couplers, and gas — in Equipment & Services, and the broader keg lineup lives under All Kegs. Not sure what fits your space? That's what the counter is for.

Wine on tap, the Bay Area way

Mike's has been San Francisco's neighborhood beverage shop since 1959, and we're the Bay Area's keg headquarters — beer, cold brew, kombucha, and yes, wine. We help offices and restaurants pick the right keg, size the gas, and get it installed. We deliver same-day in San Francisco for orders placed by 9 AM, run scheduled routes to the East Bay (Tuesdays) and South Bay (Wednesdays), and free in-store pickup is always an option.

Thinking about putting wine on tap in your break room or dining room? Start with our Wine Kegs collection, or give the shop a call and we'll build the setup around your space.

How long does a wine keg stay fresh after tapping?

Because the keg is sealed and pushed with inert gas that keeps oxygen away from the wine, a tapped wine keg typically stays fresh for several weeks — often the whole keg pours before quality ever drops, unlike an opened bottle that fades within days.

How many bottles of wine are in a keg?

A standard 19.5-liter wine keg holds about 26 bottles, which works out to roughly 130 five-ounce glasses — a strong fit for restaurants and offices serving wine by the glass.

Do I need special equipment for wine on tap?

You need a kegerator or draft tower, a coupler that matches the keg, and a gas tank with a regulator — the same core gear as beer on draft, though many operators use nitrogen or argon instead of CO₂ for wine. Mike's carries the full setup and can help you match it to your space.