Too many jobs are lost after what happens at the Office Holiday Party. Usually drinking is the main cause, but what about an invasion of Intimate Space?
People tend to get close at office parties, but don’t get too close. At an office party, there’s nothing wrong with leaning slightly toward the person you’re talking to; in fact, this body language cue indicates that you’re engaged and interested. But be respectful of other people’s space.
If you’re at a business function in the U.S., (even if that function is a party) never get closer than 18 inches. If you get any closer, you risk entering the “intimate zone” that Americans reserve for family and loved ones. Few people will feel comfortable if you invade this personal space uninvited. Invasion of intimate space with your manager can put you on his “list.”
Forbes Mag (Source)