Moderation is the key.
I would say even a drink a night wont hurt you and several sources say it helps.
Now going out and getting ripped nightly for several years is another story. Let me tell you it will NOT help your physique.
Getting ripped every now and again. Well thats gonna happen as well. Just dont make it a habit and you will be fine.
Like Dave's example if his bro doesnt do it now he will regret it in the future. I remeber and dont remember WAY more than my fare share of nights do to being chemically enhanced/declined. No regrets though. Live and learn. It was a lot of fun then, just not my cup of Joe now.
Clear as Mud?? Good. LOL