Here are Grandmaster Carlos Gracie views on alcohol. Here is an excerpt from his 1948 book:
“Alcohol: It is one of our worst enemies. It’s direct or indirect detrimental action can lead you to commit the most heinous crimes against your peers. Otherwhile, it is the originator, for petty motives or even without reason, of the most senseless conflicts between people who otherwise, in a sober state, might deeply respect and care for each other. In addition, by also perpetuating its harm through heredity, it is evidently a terrible enemy of the entire human species.” – Carlos Gracie
Rorion Gracie also shares similar views:
Do you drink at all?
No, no alcohol. I might have three glasses of wine per year. But, my theory is that if you are going to drink anyway, at least eat right. If you are going to be involved in a sporting kind of life, be aware that alcohol will affect you in the long run. But if you are forty-four or five years old and are not competing professionally, it won’t be so damaging to you!