It is a real restaurant called:
650-1 Sinsa-dong, Gangnam-gu, Seoul, South Korea
The front door
Walking down the street
It is located south of Seoul, in the city of Gangnam-gu.
You can visit there at anytime. The restaurant stays open 365 days a year. Their entrees look amazing!
Each meal is the equivalent of $27 US dollars.
Look around on the website and build up an appetite like I did.
I really need to start saving for a trip to South Korea. If I haven't mentioned that before, it bears repeating.