I understand that you mean barrister to what we call here “bartender.” is the person who is responsible for making beverages. The bartender is used a lot in the hospitality industry. Here are some uqe institutes offer this course. At least I know the Isntituto of Banking and Commerce (IBC) with campuses in:San JuanPonceMayagüezCaguasManateeCayeyFajardoGuayamaHumacaoAs for Quality and Control course I have understood that it offers the Commercial Institute in San Juan. Suerte!

You mean to a waiter or a waiter or hostess or waiter?Is dependent on a cafe or restaurant that serves you when you arrive and asks you want to eat?Basically you need is a training in customer service and in quality control, a basic course in business administration, which occur in many commercial institutes and universities in Puerto Rico. In universities is more costly and lengthy study.The complement of both, in addition to your interest in progress is what will make you successful.