As bluefeet said, there's nothing inherently wrong with the idea of expanding a site's scope. I doubt that expanding the scope of this particular site to other alcohols or alcohol in general is the right path, though.
In my experience, there's little correlation between knowledge about beer and knowledge about wines, spirits or other alcoholic drinks. And often, people who are really into beer may know nothing at all about, say, wine or vodka. Serious interest in beer does seem to lead to dabbling in homebrewing, though.
Now, granted, my experience may not be representative of the world at large, and I'm willing to be convinced otherwise, but I haven't seen much evidence yet.
The point of all this is that expanding into new territory doesn't really help overall site health if the site's existing users wouldn't participate in there and any new users wouldn't contribute to the "old territory." It'd basically be like operating two small, independent sites that just happen to share a URL for some reason that nobody understands.
So I suppose you could take everything I've said so far as a very long concurrence/upvote for bluefeet's answer. In my opinion, the long-term path forward for this site has to involve (as usual) more good questions being asked. In the SE network, we typically look for "practical, answerable questions based on actual problems that [users actually] face"; we probably need a slightly different guideline here. I don't have an idea for that different guideline off the top of my head, and it's probably better off discussed in a separate post anyways; but as one of the world's oldest and most popular drinks, beer certainly ought to be able to sustain a decent Q&A site.