See, in Finland, instead of a junior prom, we have the "Old Dances", which is admittedly more fun than it sounds. You have a partner, and throughout several months in beforehand, you have rehearsals where the school teaches you many many dances so that you've memorized all the moves (Waltz, Tango, Samba, Charleston, Lambeth Walk, Twist, Can-can for girls, Zorbas for boys, etc.), which you then dance at the event itself while all the boys have tuxedos and white gloves, while girls wear evening gowns. To be honest, the 21st century ones were the easiest ones, though they tend to require more stamina as they were faster and more energetic.
The Charleston, Salty Dog Rag, and Lambeth Walk are very easy compared to something like the Zorbas, or the ever risky tipping movement in the Tango. Really, you just need to be able to hear rythm well and to keep in step.
If it breaks, you get to keep both pieces.