It is illegal to dance in a public building after midnight.

The Law Explained

Feeling like a real-life town out of the movie Footloose, Lancaster implemented curfews on public dancing to curb late-night rowdiness and noise. The local government believed that anything happening on a dance floor past the stroke of midnight was likely to lead to immoral behavior. Dance halls were heavily monitored to ensure the music stopped precisely at 12:00 AM.