Ballroom dance involves partners dancing together either socially or competitively. There are two main styles - smooth dances like the waltz and foxtrot that are danced across the floor, and Latin dances like the cha cha and rumba that are usually performed in one spot. Some popular ballroom dances are the foxtrot, cha cha, tango, and swing dances which have energetic moves and originated in the early 20th century.