The Roaring 20s (1920-1929)

You step into your machine, and with a whoosh and a whir you materialize on a street corner, circa 1928. You are unsure of your precise location, but it is a city somewhere in the US without doubt.

You wander the streets somewhat aimlessly, just taking in the sights and watching the hustle and bustle of pre-Great-Depression America. That is, until you begin to hear some extra commotion than usual coming from a block or so away.

https://imgur.com/a/aMMthru

As you walk up, you see a small crowd hooting and hollering at a group of women, all dancing the charleston as a radio plays a tune beside them. As you see them all standing there, doing their notorious high kicks, you can't help but develop a devious idea.