I say get a pairwork book with loads of business situations. Penguin have a great Business pair work book but it's very hard to get and costs a fortune! Try the other pair work books from Penguin. The wife teaches mostly company classes and she said that anything with pairwork they really enjoy it. She plays scrabble with them once a month, class after she gives a test.
For corporate classes be careful about having too many games. They make and pay a lot of money for learning English so try and find interesting articles, pair work situations, business meetings on the phone etc which will make them just as interested as games to elementary kids
Don't dis scrabble! Once they put a little money on it, they are crazy about it!!