In the (modern) spirit of St.Patrick's day, we have researched and compiled this graph that ranks beer by, simply put, its efficiency in getting you drunk for the least calories. We got alcohol content and calorie information here, then divided alcohol content by calories per ounce and arrived at what we've scientifically called a beer efficiency score, then used that to rank nearly 130 beers. And because there is, believe it or not, such a thing as too many beers, we took some out from the mid-section (get it? ha!).