WHY BUY THIS? Because the double-sided Guinness Shamrock pub sign is sure to bring good luck to all those who enter your Man Cave. Apparently, the Druids believed that they could thwart evil spirits by carrying a three-leaf shamrock, which would enable them to see the evil spirits and allow them to escape. So, you’ll need this Guinness Shamrock pub sign in case you have any evil spirits in your Man Cave. Hey, and you’ll also need some bar glasses. We think you should have a few Guinness Pint Glasses for your Man Cave. They’re official. And you can also consider this Double Sided Pub Sign.