Ballroom dance has always been fluid, with new dances or folk dances being added to or removed from the ballroom repertoire from time to time, so no list of subcategories or dances is any more than a description of current practices. There are other dances historically accepted as ballroom dances, and are revived via the vintage dance movement. In Europe, Latin Swing dances include Argentine tango, mambo, Lindy Hop, swing boogie (sometimes also known as nostalgic boogie), and disco fox. One example of this is the subcategory of cajun dances that originated in Acadiana, with branches reaching both coasts of the United
Samba (ballroom dance) straightening of the knees, with bending occurring on the beats of 1 and 2, and the straightening occurring between. However, unlike the bouncing of, e.g., Polka, there is no considerable bobbing. Also, Samba has a specific hip action, different from that in ballroom Latin dances (Rumba and Cha-Cha-Cha). The ballroom samba is danced to music in 2/4 or 4/4 time. It uses several different rhythmic patterns in its figures, with cross-rhythms being a common feature. Thus, for three-step patterns, common step values (in beats) are: The ballroom samba is danced under several different rhythms, including the original samba music. It