Nine Tree by Parnas Seoul Insadong
Nine Tree keeps the choice straightforward when you want a conventional hotel on Insadong-gil. Anguk is the nearest station, and the hotel’s position favors days spent around Insadong and the palace area. You are choosing the location first, rather than a kitchen, a large apartment, or a hotel built around evening entertainment.
For three adults who each want their own bed, the Standard Triple is the room to look at. It has three single beds, accommodates three people, and measures 24.5 m². That solves the sleeping arrangement, though it is still a shared hotel room rather than a spacious suite.
Paid self-service laundry is available. For a sightseeing stay where you only need to wash clothes occasionally, that may be enough; you do not necessarily need to book an apartment with its own machine.
Nine Tree has a self-service luggage locker room on the fifth floor, and its hotel guide lists luggage storage there as free for guests. That can be useful if you arrive before check-in or want another walk around Insadong after checkout. Confirm locker access and availability with the hotel before planning around it.