I found this yummy recipe from
Portugese Girl CooksCourse: Drinks
Keyword: Blueberries, blueberry, Cocktail, Limeade, Non-alcoholic, Tequila, Vodka
This recipe is easily doubled or tripled for a large crowd.
For a non-alcoholic drink, add some sparkling water or club soda for an extra special drink.
You could also soak the reserved blueberries in the liquor and makes for a nice surprise while drinking.