I finally experienced a Korean jjimjilbang (찜질방)! They are best described as large, gender-segregated public bathhouses. Admittedly, it was a little nerve-wracking because a good part of it is spent naked, but I had a really good time. I enjoyed hot baths and saunas.
Also, there was a wide variety of things to do. I went to Dongbangsak Leports in Daejeon. There were seven large floors, including an outdoor area at the top to walk around.
Sleeping on a marble floor with no pillow or blankets was maybe not the most comfortable experience, but slumbering in a sleeping chamber was well worth it. It wasn’t necessarily good or bad, or better or worse than not sleeping in a small chamber, but I’m happy to say I did it.