If you're planing a big party or game day extravaganza, you might ask yourself if it's more economical to buy a beer keg instead of a few cases. Here's a simple rule of thumb you can use to find out.
Kegs of beer are appealing because they provide a lot of beer for less, you don't end up with a bunch of cans and bottles lying around, and you don't have to make room in your fridge for everybody's six-pack. Still, you probably don't need one at you next footy final party. As Allison Russo at The Kitchn explains, a proper, full-size beer keg comes in at about 61 litres, which is roughly equal to 160 bottles of beer. That's about eight beers for 20 people, or 16 beers for ten. That's a lot of beer.
Most parties won't need that much, but if you're hosting an all-day gathering for a large group of people it could still be worth it - especially if you get a quarter barrel keg instead, or even a 5-litre mini keg. But honestly, if you have less than 35 people coming over, you should probably just pick up a few cases. You'll get more variety anyway.