Probably the best way for the Koreans, but it will take work, is to go through humaniplex.com
Build a profile with a few safe ratings and that is a start. Seriously it takes work and time. Or you can provide crazy personal info which I would not suggest at all. Do not do that! You do not want to give work info and drivers license info to any house. A burner phone won't help.
There are Korean houses in west LA, and Mid Wilshire also.