To make the spicy ginger syrup, bring 1/2 cup water, the honey, ginger, and cayenne to a boil over high heat. Once boiling simmer, 1-2 minutes and then remove from the heat. Add the mint, cover, and let sit 10 minutes. Strain out the ginger and mint. Store in a glass jar in the fridge for up to 2 weeks.On a small plate, mix the coarse sugar, sugar, and a pinch of cayenne. Run a lime wedge around the rim of your glass and dip into the sugar mix. Fill your glass with ice. Add the pomegranate juice, grapefruit juice, lime juice, spicy ginger syrup, and tequila. Stir to combine and then top with ginger beer. Enjoy!