Stinky Attic is quite right. Were you to find a hook up, it would be very important to be as secretive as possible, especially around Koreans. Korean society is based on gossip, and if one Korean knows something secret, soon at least fifteen Koreans will hear about it. Most of the arrests made when I was there were due to jealous Korean girlfriends turning in foreign boyfriends who were being unfaithful, or jealous Korean males (there doesn't really have to be a reason for this jealousy, most just don't particularly like foreign males- you know what I mean).