Get a double shot glass. Fill it half way with Tequila (don't use gold tequila), fill the remainder with Tonic Water, then add a splash of Grenadine. Get your friends together - everyone gets one. Cover the glass with a paper towel and boom boom it twice on a hard surface - like a wood block so it doesn't damage your table or counter. The drink will turn fizzy and everyone downs their's in one gulp. Then give each other high fives. Perfect for weddings.