Stay strong while they grumble, and insist they put it in.
When completely lost, call +82 2 120, the city's help center, which has various language assistance options including English, Japanese and Chinese.
3. Hotel bookings should be based on location
Due to transit times (up to 90 minutes to two hours to cross the city during rush hour) it's best to choose your hotel based on your meeting locations.
Best hotels, by business hub:
Yeouido: Conrad Seoul, Marriott Executive Apartments, Sheraton D Cube City
Myeongdong: Westin Chosun, The Plaza, Ibis Ambassador Seoul Myeongdong, Fraser Place
Samseong (near COEX convention center): Grand InterContinental Seoul Parnas, InterContinental Seoul COEX, Park Hyatt, Oakwood Premier Coex Center
Best hotels if you're flexible with location:
Gangnam (south of river): JW Marriott, Ritz-Carlton, Novotel Ambassador
Gangbuk (north of river): The Shilla, Grand Hyatt, Banyan Tree Club & Spa, W Seoul Walkerhill
4. Bring business cards. As in, a whole box
In Korea, the standard business-related introduction involves reverently receiving and returning a business card, bowing and shaking hands, somehow all at the same time.
When the exchange is done over a meal, it's common to lay out the business cards of everyone at the table on the table in front of you so that you can remember everyone's name and position as you talk to them.
"That's one of the things that people wish they had known before coming here -- how quickly they're going to run out of business cards," says Seoul Convention Bureau vice president Maureen O'Crowley.
5. Wear nice socks at all times
It's not just a matter of style -- it's protection against embarrassment.
Many traditional Korean and Japanese restaurants (popular for business lunches and dinners) require patrons to leave shoes at the door.
Few local humiliations match having a toe sticking out of an old, dirty sock in the midst of serious business talk.
6. Be prepared to drink and bow