O-line line dances such as the "Memphis Tush Push" also known as the "Tush Push" do not require specific lines, but rather is an action-related dance where all members in a group do the same movements.
Circle line dances have members of a group in a big circle, or several circles, one around the other. A common circle line dance is the "Cherokee Kick."
Contra dances usually consist of two lines, often men in one, women in the other, or some other division. In larger crowds, there are more than two lines, but they are split off into two lines per section. Complimentary numbers of dancers in each line are preferred, but not required. The dances consist of segments of steps repeated indefinitely until the end of the song.
Progressive line dances, also called traveling line dances include the "Ten Step Polka, the "Long Branch Hussle," the "Tennessee Walk" and the "Sway." Progressive dances travel across the floor rather than taking place in a definite limited personal space for each dancer.
There is no genre that can't adapt to line dancing. The most popular genre for line dancing is country music. Line dancing became very popular thanks to country music clubs and line dances created specifically for country songs describing the actions. It was the natural offspring of square dancing, but line dancing allowed for more individual participation and a greater variety of steps. However, the cha cha, rumba, waltz and many original "made for line dancing" styles are excellent forms of line dancing that enjoy great success in nightclubs and gatherings.
Strict line-style dances are typically solo dances done in large groups of individuals all doing the same movement. Contra and progressive styles usually employ a ballroom or square dancing partnership and have partners dancing in patterns that occur in sets or move across wide spaces of the floor.