1970s: Fondue parties
Melted cheese is delicious. So is chocolate. And while we're glad fondue remains an option, it's crazy to think about a time when gathering around a fancy pot of boiling cheese with skewers of bread was happening on the daily. Have you ever cleaned a fondue pot? We haven't, but it looks like a ton of work.
1980s: Caviar craze
The '80s were a time of decadence, so it makes sense that people would latch onto a notoriously expensive emblem of the upper class. During this decade, over 1,000 tons of salty fish eggs were processed worldwide. It was popular on its own, or on blinis with sour cream. It was also later name-checked in the Dynasty reunion special, which actually might be the most '80s thing about it.
1980s/1990s: Cabbage soup diet
For such a weird and unappealing fad, this one has a way of showing up everywhere. It technically conducted its first reign of terror in the '50s, but made a bigger splash in the '80s and ensuing '90s thanks to Dolly Parton. Dolly became so associated with the seven-day system that many people just called it the "Dolly Parton Diet," but boy is it an unpleasant thing to have your name slapped onto. The plan requires you to eat a ton of smelly cabbage soup, along with certain fruits, veggies, or meats assigned on different days. It supposedly can knock off up to 10lbs in a week -- like most risky crash diets -- but is eating that volume of cabbage worth it? Of course not.