I have no doubt that there will be some people in the congregation who would be disappointed in that you drink beer. Even in some of the "looser" churches there will be people who interpret the Bible incorrectly, or simply take the word on the church street that "Alcohol is bad!" Some may even have been down the dark road with alcohol themselves, either by being alcoholic or by being affected by someone who was.
Part of being a good person is being in control of your actions and words. I believe that is what the Bible refers to when talking about drunkeness. It doesn't forbid drinking at all, it forbids being drunk, which is in essence a way of saying you should not lose control of you ability to reason and control your actions and words, lest you make mistakes in judgement that could cause harm to others.
I'm not sure how you might approach a whole congregation. If I were to do it I would probably keep it on the QT initially, while not exactly hiding it. If anyone asks of course you might answer that in your judgement, it should not be a problem. It is an honorable hobby, and you don't encourage anyone to drink to excess. (I know Catholics who drink and claim all they have to do is to say a few hail Marys or whatever, but obviously you don't want to ENCOURAGE anyone to have to repent, right??)
There is a very rich history that goes with brewing. Maybe focus on that?
Your worst case scenario is when a certain person finds out and starts spreading gossip and opinion without discussing it first. Many good people think a Pastor should be Jesus incarnate and not have a single human trait. Good luck with those.
Oh yeah, and I've also heard more than a couple of jokes from Pastors about preaching while having a few. Makes it easier to stand up there in front of people, some of whom are there only to see if he "got it right...", rather than listening to what the message was really about.