Friend of mine found the web-site www.clubinkorea.com
they allow to enter clubs in korea for free with their partner clubs.
I've been to many events where they saying "Club Free entry"
But those were shitty small clubs.
However, this one is different. Gives a free entrance to major clubs in Seoul/Busan
(Though I never been to Busan yet)
I actually tried to go to Club Syndrome (Gangnam) through this site and did work last weekend.
Sometimes, I think "Small information" Gives a lot of advantages in Seoul-Life.
We all should share the good informations.
So, what else do you have guys