When you think "1970s Party" you think fondue. Still, it defies logic that a pot full of melted cheese has been out of fashion for over 40 years. In these Instagram-obsessed times, could there possibly be something more attractive than putting a pot of sexy cheese in a room full of sexy people? Absolutely not. Call your friends over immediately, because it's time to get your #cheesevibes on.
Place the Cheddar, Gruyere and Swiss cheeses into a large zip-top bag along with the flour. Shake well to coat.
Bring the Sauvignon Blanc to a boil in a large saucepan, then reduce to a simmer. Whisk in the cheese 1/2 cup at a time, making sure the cheese melts before each addition. Add the butter and malt vinegar, then reduce the heat to the lowest possible setting to keep warm.
Using a chef knife, microplane zester or handheld press, crush the garlic into a paste, reserving the juices. Rub all over the inside of a fondue pot to coat well. If there is any excess garlic paste, toss it into the saucepan and whisk it in.
Pour the fondue into the prepared pot and serve immediately with sliced apples and pears, roasted potatoes, chunks of fresh bread or whatever else you feel like dunking in a big vat of melted cheese.