The Charleston dance became extremely popular in the especially with Flappers. The flappers had a beautiful style that was easier portrayed in posters, as their long dresses created movement to represent the Charleston.
“Splifficated” and Other Obscure Slang Words from the 1920s
From the book: "World champion Charleston dancer Bee Jackson wears a beaded and fringed dance dress, popular at the time, as the fringes would shimmer and shake and draw attention to movement. This dress is shorter than the typical styles of the era.