You can get some stuff at Koriya that is strictly Korean, but it's more like a Korean Japanese fusion place. Golden Korean has a menu similar to those you'd see at a typical restaurant in Korea. K Fried Chicken is pretty authentic to fried chicken places that are popular there (the yang nyum sauce in particular and its hella good) and they have some other good dishes there as well. Bawi is more upscale than any BBQ place I went to in Seoul, but it's good, gives you a decent feel for the Korean BBQ experience, and I believe you can get soju and Korean beer (which is not particularly good beer) there as well. When you go, best favor you can do yourself is find a good seafood place which will probably be close to the seafood market. Nothing around here can compare to good seafood that was in the ocean the day before, and alive less than an hour before you eat it