The Design Museum
Also in Seoul, within the Hongdae area, is a sort of café known as The Design Museum. They collect chairs of various vintages, and rotate them through the café over time. In the basement, there are many different styles of chairs. Many of the doors within the building are taken from trains or subway cars. When I visited in October, they had a 70s look going on in the main area of the restaurant. Those chairs were matched. The ones in the basement, however…
The lighting is also something to look at as well.
It happens to be a great place for people watching if you go on a weekend or holiday night.