Need a Good Excuse
The weekend tradition of going out to bars and drinking excessively is a big part of South Korean culture, as they work very hard during the weekdays. It appears that Koreans can get extremely upset if you don’t live your life like them. You’ll need a good reason if you don’t want to drink.
When it comes to alcohol, Koreans may take offense if you refuse an invitation to go drinking. So make sure you have a good and believable excuse prepared in advance. Of course, you should never drink if you don’t want to, but if you put as much effort as the Koreans do, that scenario is extremely unlikely.