Ick, just ick. Diddling the help is a hobby fraught with hazards (she knows where you work). Work is the worst place in the world to date - there's no escape for you unless you find another job.
I'm not crazy about the idea of alcohol at office Christmas parties either. Just too many ways to trip over your **** and tell the boss what you REALLY think.
I don't like alcohol at office parties because the maintenance crew has to spend a week cleaning up stains in the carpet and repairing holes in the walls. One year we had to replace an entire exterior door-frame.