Having been to South Korea myself, I have no idea why you would frequent a night club there. The ones I saw in Seoul looked real sketchy to me.
I noticed long ago, it is probably not a good practice to Boogie on a balcony with a whole bunch of other people.
The scariest thing I experienced at a Seoul nightclub was all these dudes from Samsung dancing together. They weren’t gay, it was just acceptable there, like all the Korean teenage schoolgirls and young office girls holding hands while walking side by side along the sidewalk. Also rotating glasses around the table to take a swig of someone else’s backwash. Some cultural differences are best left overseas.