According to the old terminology adopted in the US in the 19th century, a fifth is 1/5 of a gallon, which is around 750ml. If we know that a standard shot glass in bars has 1.5-2 ounces, we can say that it is approximately 12-13 2oz shots. If you choose to drink 1.5 ounces of a drink in smaller glasses, it will be 17 glasses. A standard beer is 12oz, however the alcohol content of beer is far less than liquor. Insidermonkey experts made a list of 10 easiest fifths to drink in one night.
The more important question is: why would anyone try to drink so much alcohol in one night? What proves that this is a good question is the presence of so many answers on the internet about drinking alcohol as a type of sport, fun or even a competition among people. As we could see in our article concerning 7 Easiest and Fun Drinking Games for Groups, many people think that drinking too much alcohol is fun or funny in groups.