From the book I mentioned here comes photos of the interior of the Bando Hotel (seen above). The hotel was built in the late 30s or early 40s (anyone know when exactly?) as the Hanto Hotel, and was the tallest building in the city for years. It was used as the US Embassy from 1948 to 1962, and was demolished to make way for the Lotte Hotel in the late 1970s. Here's what it looked like on the inside:
I think it appears briefly in this video (posted here two months ago, when I missed it). It can also be seen in this post, along with several photos taken from its roof in 1945.
Update, June 23, 2023:
The 1974 Eighth Army Chronology has the following entry for June 20, 1974:
Seoul's 38-year-old Bando Hotel closes to make room for the 45-story Hotel Lotte. From Aug 45 to Aug 53, the nine-story building, once Korea's finest, served alternately as HQ for USAMGIK and the XXIV Corps, the American Embassy, US economic aid mission, and field grade quarters for Eighth Army.