Alcohol and bar facts you may not know #bartender

Why do so many bartenders not make a margarita the same? If you are allergic to almonds what do you need to know when visiting a bar? Non alcoholic beer still has alcohol in it. Blue curaçao and triple sec are very similar in flavor and could be used interchangeably. Why do Moscow mules come in copper mugs? Why are restaurants and bars not putting Moscow mules in solid copper mugs?