before you take a job, you should ask which subway stop you'll be living closest to. i live in pyeongchon, off the blue line 4 towards oido (bottom middle left of the map, ignore the red arrow). i love where i live, but it can be hard b/c it sure is easier to socialize when you live in/close to seoul. im a 45 min subway ride south of itaewon. if i go out to a bar or club, or run late hanging out with friends, i have to be mindful of catching the last subway at 11pm-ish, or the last bus at midnight, to get home. if not, then im out all night and catch the first train in the morning around 5:30am, OR i can take a taxi, which can run 20$ on a good night, $30-something on a bad one. sometimes people stay in a hotel (i think love motels are 20 bucks a night?) or stay in a sauna which are 5 to 10 bucks i think.