Ballroom dance is a set of partner dances, which are enjoyed both socially and competitively around the world. Because of its performance and entertainment aspects, ballroom dance is also widely enjoyed on stage, film, and television. It has its roots early in the 20th century, when several different things happened more or less at the same time.
As a beginner you ought to know what you want and that your needs match your instructors expertise and methods. Talking to the other students and seeing how long they've been at the class or visiting one or more dance classes may give you a good idea if it is a match. Some schools, for example, specialize in competitive dancing; while others focus on helping first-time dancers gain the experience (and courage!) to brave the ballroom dance floor at their next wedding invitation. A dance teacher will be able to give you individualized instruction that is key to improving your dance skills.
While you may have some basic knowledge of ballroom dance steps, classes will help you with all the other important aspects that make up a dance, including posture, communication, and dance etiquette. The secret to dancing together, as opposed to dancing near one another, is communication. This communication isn't conveyed through some special code, but is rather accomplished through the subtle body movements that can easily be detected when both dancers are standing upright, with good posture.