56 - Percentage increase in your risk of stroke if you binge drink (consume six or more drinks in one session), according to new research reported in the journal Stroke.
UPDATE 6/16/09 - Because of a link between longevity and alcohol consumption you are almost twice as likely to live to the age of 85 if you limit your alcohol intake to no more than two drinks a day... maybe this is because your not as likely to have strokes. :)
Source
This quote originated from the April 2009 issue of Best Life magazine: