Smoking is not as commonplace and is subject to restrictions in most public places. Before smoking, the best policy is to ask if anyone minds, or wait to see if others smoke. Restaurants often have a section where smoking is permitted; many hotels designate rooms as smoking and non-smoking.
A handshake is the customary greeting for both men and women, although you should wait to see if the woman offers her hand.
Apart from greeting close family members or friends, Americans tend to refrain from greetings that involve hugging and other close physical contact. For the most part, they are unreceptive to being touched during conversation and other social situations.
The standard space between you and your conversation partner should be about two feet. Most U.S. executives will be uncomfortable standing at a closer distance.
Direct eye contact conveys that you are sincere, although it should not be too intense. Certain ethnic groups will look away to show respect.
Friends or acquaintances of the same sex generally do not hold hands.
To point, you may use the index finger, although it's impolite to point at another person.
To beckon someone, wave either all the fingers or just the index finger in a scooping motion, with the palm facing up.
To show approval, there are two common gestures: the “O.K.” sign, formed by making a circle of the thumb and index finger, and the “thumbs up” sign, formed by making a fist and pointing the thumb upward.
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