My mouth is watering just looking at you.
Go out the Itaewon Gate.
Go to Itaewon
Cross the street at the first street crossing
Walk past the first alley
The street will split - you will be able to go straight into Itaewon OR you can veer to the right and go up a hill....
Veer to the right and go up the hill
Vatos will be at the top of the hill (right next to Standard Charter Bank)