This is usually temporary side work to pocket a few bucks. Note that I’ve updated this short list as of August 11, 2013.
The clerks here will often ask what kind of girl you want. You don’t really have to worry about fat girls or old girls here, but there are some rail thin chicks occasionally. I had a chance to visit Seoul again recently and found that some of the places I mentioned have either shut down or I forgot where the hell they were.
Extras are at the full discretion of the service provider.
Follow the rules for your sake and the sake of the girl.
You can also set a series of short appointments with multiple women.