I’d go with the late 1920s, right before the Great Depression. The speakeasy vibe, jazz, art‑deco design give you plenty of authentic details, and a few carefully placed futuristic touches—like a glowing jukebox or a robotic bartender—let us have a little fun. It’s a period where history and imagination can coexist without the anachronistic clutter.

I love the idea. Keep the dance floor a true 1920s Charleston spot, but add a subtle neon outline so the dancers feel like they’re moving through light. The back‑story could hinge on a hidden speakeasy run by a former dance instructor who’s secretly a jazz composer. She uses the club to test new, experimental rhythms—tiny futuristic twists that keep the music fresh but still rooted in the era. And make sure the bar stools are polished oak with brass inlays, and the robot bartender has a vintage tuxedo jacket—classic yet unmistakably modern. That balance will keep the audience grounded in history while letting their imagination stretch a little.