OK, you learned how to open your soju bottle. Now, you just start pouring for whoever is closest to you. Wrong again.
As a formerly Confucian society, South Korea still strictly adheres to the principles of respecting your elders. And by that, we don’t mean people over 65; we mean anyone who is born even a year before you.
So, really, the first thing you need to do when interacting with a Korean person is ask their age. Trust us, they won’t be offended. Once you know the age hierarchy of the group, you can know how to act with each person.
Generally, you should pour drinks for the oldest person first (or, in a work context, the person with the highest ranking) and wait for them to do cheers before drinking yourself. If possible, you should also not refuse the first soju drink an elder offers you, which will normally be poured into a small glass and drunk as a shot.
When taking the shot, do not, we repeat, do not, drink facing your elder or superior. It’s considered very rude to show your open mouth. Instead, turn sideways and cover your mouth with one hand while using the other to take the shot.
On the flip side, if you’re drinking with friends who are younger, you can have a lot of fun asking them to show you performative respect.