You could even be the first pub in the new world and attract survivors from all around the world, ensuring you charge a good trade on entry to help you build a stockpile of weapons and supplies. You could have your very own bar, complete with hot barmaids and bottled beer. Everyone who is prepared for the zombie apocalypse has seen Shaun of the Dead, owning your own pub just like the Winchester is every man’s dream. Think of it as a way to bring capitalism to the apocalypse and your Steve Jobs, the guy at the top.
One drawback to serving alcohol in the apocalypse may be that the decision to turf someone out onto the street for being a bit too drunk may actually mean they lose their life. A few rooms upstairs just for paying guests may be something you need to consider. Security on the other hand should be simple, get everyone to strip down to basics before entering to ensure no concealed weapons. After a few good trades you will have built up a rather tasty arsenal of weapons to rely on when looters come calling. But most likely people will enjoy your pub and customers will protect this little slice of heaven in a nightmare world.
So forget learning how to change a light bulb and rewire a toaster the skills you need come the apocalypse will be simpler than that. Once you have attempted a few batches you will get more adept at flavouring and ensure that you have different varieties, perhaps a nice fruity batch for the lady survivor and a dark and heavy batch for those hardened road warriors.
You never know, beer might just save your life. Home brewing is a valuable skill that if suddenly over run by looters you will be able to bargain for your life with.