Booze thins your blood so probably not a good idea
Definitely not adviseable to drink alcohol the night before this procedure. Like j34 above mentioned, alcohol IS a blood thinner, so it could cause some increased bleeding. Not to mention, the anesthesia may cause you a few side effects, and alcohol use could possibly worsen those.
Just not a good idea all around.
Sorry I should clarify, I'm drinking the in the night after my surgery in the afternoon.