Frodo, I feel your pain. I'm a total lush and not drinking at all was tough! My husband was working at a bar on weekends so I was spending every Friday and Saturday night in a bar drinking ice water w/limes. FOR 6 WEEKS!!!
It's your choice, but the mental commitment is important. There will be other occasions for drunkeness (there alway is!) If I can do it for 6 weekends in a bar, I'm sure you can make it for one more week. Besides, do you have any idea of how much fun it is to mess with the drunks when you're sober?