Having visited Dancen for the first time last night, I will add these points to the discussion:
My wife and I were the only non-Korean-Americans in the place, and we were made to feel very welcome.
The space is very casual, really a bar with great food to share.
The Fire Chicken was terrific, very spicy and flavorful, right off the grill, skin on and a bit fatty but delicious. Every table in the house ordered this. It is a big plate of bird that runs about $12. Comes with shredded cabbage salad and side of pickled radish (both good).
The Spicy Pork Ribs were another story. Flavor was great, but the thin slices of meat contained dozens of very thin shards of bones. I do not know if you are supposed to eat the bone fragments or spit them out, but we both found this dish very off putting. Confirm boneless-ness of dishes.
A very good cheese and onion omelette arrives with drinks, for free. Yum.
Food is not up to the standard of the best Korean in town (which is Gogi, IMHO), but this is a different type of venue and experience.