Uno Chicago Grill is a family restaurant in the similar mold and menu of TGIF and Bennigans. A noteable difference is that they have kept nachos on their appetizer menu, while the others have dropped it.
Also, Uno's gives you nachos and salsa, as well as bread and butter, while you wait for your food, whereas the other family restaurants only give you bread and butter.
They have three locations in Seoul.
Homepage and maps(Korean)