My 2 cents on Youngdengpo
As a Gyopo, Youngdengpo has actually become one of my favorites. I don't know if it's my taste or if the best looking girls at 588, miari or yongsan are just busy when I come around (I just can't seem to get there enough at peak hours), but I consistently find the girls that I like at Youngdengpo. I don't find them any dirtier or cleaner than other girls at other RLDs. The area looks a bit more seedy and dangerous, in part because of small shops with guys working with metals and of a police station nearby.
I find the girls less mechanical than Yongsan on the average. I also like the girls I find in the afternoons there. They see less customers walking by, but they tell me they have their regulars and plenty income. I found one of the most gorgeous girl, physically and facially, that I have ever had sex with working in the afternoon. I was addicted to her for a whole week before I left and kept thinking about her back in the States.
I honestly don't know if they take foreigners but people on the board have told us that they don't.
Does this post help you out? Maybe, if you're a gyopo. As foreigner, you could try if you have time, but I recommend yongsan, miari or anma.
Btw, I am not in Korea enough to know all RLDs in details and my RLD fun is kept secret with everyone so I have to go alone. So, that pretty much limits my ability to check things out. It's best to go with another person and preferably a local, because ajumas, karaoke places and room salons will treat you better and in some cases not try to rip you off.