I've stayed in a few jimjilbangs (sleeping rooms) in korea as they are usually cheap under $10. For this you change into robes and leave your stuff in a locker. There are showers and spas seperated by genders. The sleeping halls are either communal for families/couples or seperated by genders.
My issues with this places is that its underground so not really any proper way to vent all the heat generated so its quite hot. You need to keep a water bottle with you.
Also its crowded and people were coming late, chatting, and having a party. Its a busy nightlife area so to be expected. It doesnt quited down till 3am.
Then from 5am people have programmed their cellphone alarms so you wont really get much sleep if you are a light sleeper.
If you are looking for somewhere cheap to crash its fine but not your best nights sleep. I would chose another jimjilbang next time in Seoul
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