Study Suggests a Change of Greetings in Professional Kitchens
A handshake is many things, mostly positive. It conveys feelings of friendship and common ground. The handshake builds customer confidence when greeted by their chef, server or bartender.
A university study in the United Kingdom provides some added information to help assess the risk at your facility. It shows that a handshake significantly transfers a greater level of germs when compared to a fist bump.
When making choices regarding greetings, the elbow-to-elbow tap has its place, keeping busy hands delivering professional service with a smile. The elbow tap technique is especially useful between staff members.
http://www.aber.ac.uk/en/news/archive/2014/07/title-153773-en.html