见图:
ATM的详细信息：
It is owned by Coinplug and connected to their exchange
No ID required to use
Limit of 100.000 won (~$100), but you can use the same address up to three times
The fee is less than 1%, as the ATM is mainly promotional, not for profit
It can be found in a cafe called "Coffee Sedona" inside of the COEX Mall at Samseong Station (삼성역)
It is a little bit hard to find, I recommend you look at this map
The menu is in Korean, the map link above also contains a translation (don't worry, it's a very easy machine)
You can pay with bitcoin in the cafe
I host a weekly meetup every Saturday at this location. If you're in Seoul, feel free to join us.
