The Charleston is a fast and flashy dance that swept the nation in the twenties. It is done by both individuals and couples and is danced both socially and in performance. The Lindy Hop, which emerged in the late 1920s, contains a lot of Charleston steps.
If you are interested in historic footage of the Charleston as it was danced in the twenties, check out America Dances. To see a really interesting historic film clip of early Lindy Hop, danced by Shorty George among others, check out At the Jazz Band Ball. Then, you might be interested in Alison and Joel's Swingbrain CD-Rom which teaches the steps from After Seben.