Round dancing parallels ballroom dancing in several ways. Round dancing, like ballroom, is a couples dance which is comprised of many rhythms. At a round dance you will find waltz and foxtrot, as well as latin dances such as rumba, cha-cha and tango. Many round dance instructors will start out teaching two-step which is relatively simple and can be danced at square dances. As the dancers gain experience, the teachers will introduce waltz, foxtrot and the latins.
Round dance is taught and learned by phases.
The starting point is phase 1 with progression to phase 6. You can participate in round dancing at round dance clubs, festivals, clinics, and square dances. Here is where you can find various information on round dancing as well as listings from several round dance clubs and their dance schedules. The answer will of course vary from person to person but many would say because it is great fun and the people are the nicest you can find. The round dance community is a very friendly group of people who like to dance and have a good time.