This is a super-old post from last year that I totally forgot I'd started. Oops! I remember it was from somewhere around last Christmas, because the restaurant was playing some very dubious Korean covers of classic Christmas pop hits.
I'll keep it short and sweet, mainly because I can't remember anything except that I enjoyed the food. Heh.
There's usually a person stationed outside to let you in or sort out something if there's a wait. Since it's upstairs, I guess it saves you some time rather than going all the way up to find out there's a 2hr wait.
They also have little walkie-talkies, so when we went in we were announced FBI-style to someone upstairs. By the time our unhealthy selves had carried us up, they were all prepared and ushered us over to a specific table. It was fairly quiet when we went, because it was late, but I can imagine this place is pretty organised when it comes to seating customers.