Alcohol Server Training
Although you don't need to attend a bartending school in order to serve drinks, many states in the US require that you pass an Alcohol Server Training course. This course is designed to help prevent underage drinking, drunk driving, and overconsumption. Even if you're not legally required to take the course, it will benefit you in the long run.
Bartending can be a fun and rewarding career but you need to be aware of the risks, both to yourself and to your customers. A good alcohol server training course will not only promote alcohol safety, but provide you with specific techniques on how to deal with customers that may be intoxicated.
The course should detail everything from how alcohol effects the body to how to protect yourself and the establishment you work for from liability. Much of this comes from practicing good common sense. There will be times when as a bartender you'll be required to intervene to protect both your customers and the establishment.
The establishment that hires you should provide you with information on where to go to get your alcohol server training permit. For more information you can check out the following article http://en.wikipedia.org/wiki/Alcohol_Server_Training. At the end of the article are links to various organizations including places where you can take an online alcohol server training course.