Greetings
Man greeting Man – A handshake or a nodding of the head one time tends to be the most common greeting. Sometimes a shoulder-hug is common between good friends. Usually the person arriving will shake hands accompanied with a warm smile to the other person.
Woman greeting Woman - A handshake is acceptable but just verbal greetings is more common.
Man greeting Woman - For meetings between men and women it really depends on age as older folks are more casual with one another but younger people – especially teenagers – often stay in their separate gender groups, as casual meeting or conversation would cause others to assume they’re in a relationship. There’s usually no physical contact made, smiling and saying, “Hello”, is about it.
Note: Friends and family don’t generally hug one another when they meet, except if it’s after not having seen one another for a significant amount of time.