Ballroom dance is the name for a number of dances done in ballrooms. It usually means pairs (mostly a man and woman) dancing separately from other pairs. The most important difference in style is between the modern or standard dances and the Latin dances.
The modern dances are the waltz, quickstep, foxtrot, tango and Viennese waltz. The Latin dances are the cha-cha-cha, samba, rumba, paso doble,ricardo milos and jive.
However, there are also sequence dances, where dancers move together in a pre-set pattern.