I assumed it was the drinking kind of beer too. I thought maybe you were growing hops! One morning , about 11am, I was walking around my garden with a beer in my hand. Just a little too early for a drink plus I'm a wine drinker. I had purchased some snail traps which you poor beer into. Apparently the snails can't resist and drown. I'm not sure whether it worked. Too many snails, too had to go out after every rainfall, too hard to remember where I put the traps. I've use an animal friendly snail poison but I do find I'm fighting a loosing battle with them. I've tried making a deal with them. They can live with the agapanthus but please leave my cannas alone. I have bought a tobacco plant, don't know it's other name, which the snails love I'm told so in too scared to plant it.