Gestures aren’t the only area in which the unwary traveler can get tripped up. Foreign cultures adhere different business customs (1) and behavior. For example: Caffeine junkies should restrain them (2) in the Middle East. "Three cups of tea or coffee is usually the polite limit in offices and during social calls," counsel "Travel Pak, " a (3) free publication of Alia, the Royal Jordanian Airline. "And if your host (4) keeps going, you also may continue sipping. If you’ve had your fill, give your empty cup a quick twist-a sort of wiggle-as you hand it back. That means "No more, thank you. " Middle East visitors also should be surprised "if others barge (5) right into the office in the middle of your conversation with the person you are seeing," notes "Travel Pak." An old Arab custom calls for keeping an " open office." The British, however, consider it impolite to interrupt into a visitor, (6) even after all business has been transacted. The commercial caller is expected to be sensible to this point, know when to stop, and initiate (7) his or her own departure. In Japan certain guests at evening business gatherings will leave early. They should be allowed to leave with effusive good- (8) byes. The Japanese consider formal departures to be disruptive in such cases and disturbing to remain guests. (9) In the Arab world, the word "no" must be mentioned three times before it is accepted. On contrast, it is considered good business (10) manners to make many and long efforts to pick up the check.