Though I drank a lot of root beer years ago, these days all of my soda needs are taken up by Diet Coke and Pepsi (yes, I have someone learned to love both of them). But icy cold root beer can hit the spot on a warm day. I have to admit I've never had it with alcohol involved.
But AOL Food has the recipe (from DrinksTV) for Hard Root Beer, which is basically 8 ounces of root beer and 2 ounces of spiced rum. Pretty simple and delicious-sounding (unless, of course, you don't like root beer and/or rum, I guess). Some people, however, think the amount of rum should be kicked up a notch. This one calls for some experimentation.