It is unlawful to play an accordion on the street after 10:00 PM.

The Law Explained

Milwaukee's rich German and Polish heritage meant that polka music and accordions were incredibly popular, sometimes to the annoyance of sleeping residents. An old noise ordinance specifically singled out the accordion, banning late-night squeezing to ensure a quiet neighborhood. You can still play your accordion, but you have to pack it up by bedtime.