Man greeting Man – Handshakes are the most common form of greeting.  They are usually gentle and not to prolonged.  Many people use a two handed handshake when greeting and departing. 

Woman greeting Woman- While handshakes are a common form of greeting, many times a simple nod of acknowledgment will do.

Man greeting Woman -   While handshakes are a common form of greeting, many times a simple nod or slight bow will do.  Wait for the woman to initiate.