This amount of alcohol on a regular basis (several times a week) can and will cause all kinds of brain damage, not so good for someone who makes a living using their brain.
That's all I have right now from reputable sources (that I have handy). I'm sure a simple google search will turn up a lot more (although there is a ton of pseudo science as well).
I appreciate the separation of reputable from pseudo. I did a search, but a disproportionate amount of the content was fluff and pseudo, and I don't really have the expertise to tell quickly between the closer cases.