Harney & Sons Mokdong

Harney & Sons is a US tea company, and the Mokdong branch is a sit-down tea room serving brewed loose-leaf rather than a take-out coffee bar.
Locals book it for the afternoon tea set, with milk tea and black tea on the regular menu and a tomato soup that gets repeat mentions in Korean reviews.
The room is tucked into a Yangcheon-gu side street near Omokgyo Station and reads quieter than the Anguk and Seongsu tourist scene, more neighborhood ritual than landmark.