I am always on the lookout for new cafes and new places to take guests to in Korea. I was lucky enough to stumble upon 뜰안 (Inner Garden) near my office. It's got a great sense of traditional style and the tea is pretty good. I really like the little garden they have and their hanok styling. My only complaint is that they try a bit too hard to copy my other favorite tea house: the second best tea house in Seoul over in Samcheongdong.
뜰안 (Inner Garden)
Go out Anguk Station Exit 4 and go straight. Make a left at Nakgwon Market (낙원상가) and make a right after Crown Hotel.