Your behavior at the office party can help or hurt your career. Remember that the office party is still a business function. It is wrapped in a social context, but it's still a business function. Many other business events have a social context, such as taking the client to lunch or attending the charity dinner to receive the award for the company. Those who observe your behavior at the office party will remember it when they consider you for other business social events. The good news is it works both ways. ( Edited by plmiller )  

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