A-ONE is a small cafe bar in Ximending that serves strong coffee, tea, and cocktails. The espresso and Blue Mountain are bold, and the pineapple binggyul cha uses a pineapple sauce the owner makes in-house. There is an air-conditioned room and a small balcony on the second floor, and guests can go up to the third floor to pick a seat. The wooden stairs are narrow and very steep.