I've heard good things about Bong Su and have been meaning to check it out. I only went there tonight for a mixer so I didn't get a chance to sample the food there (except for some appetizers that were served, which were pretty good). The mixer had a great turnout, although I don't know if the attendees were necessarily representative of the type of clientele that normally frequents this restaurant. In order to get a better sense of the restaurant's typical customers, I made a stroll through the main dining hall. It's Tuesday night so it wasn't too busy but there were a number of attractive people - mostly business types. There was a table of four men in suits, probably having some business meeting or just came from a conference at Moscone, but they were all pretty cute. Too bad they didn't come to the bar to join our mixer! Given that there were some cute men, I give Bong Su 1 Q. However, it's not really a place where you can really meet people (unless there is an organized even) since it seems to cater more to business meals.
So far, the general observation from me and my girlfriend at the mixer tonight is that SF is in great danger to lose to the European cities in terms of places with high Q-ratings. Where are all the good-looking men in the Bay Area?