pool in korea
hi i'm currently stationed in korea so maybe i can help a little i'm not to familiar with the area you are staying. But there should be no problem finding a place to play pocket ball, also give carom a try you find that the room owners will help you the tend to like recruit the local kids and teach them how to play. If you go to an bar aimed at service members you usually don't have to pay and the equipment is usually in decent condition.
For places that charge it's usually hourly and its something like 6 or 7,000
won an hour, which is now, like 4.50 to 5.50 but that includes "cola" or iced coffee on the house lol.