I found a jja jjang min, black bean noodle, place in Las Vegas. This place is located inside of Greenland korean supermarket.
I ordered jja jjang min combo with spicy seafood noodle and sweet sour pork. It was only $13 for all that food. It's good for two people to share. And it was delicious! I did take one star off because the sweet sour pork came in all different sizes. Some were huge and some were itty bitty.
The lady who took my order was nice. We ordered two of the same combo and she personally bought the second tray to our table. What a service!
I would definitely return when I visit Las Vegas.