Looks like Houma, Louisiana is leading the way on public safety initiatives in the US:
Clyde Scott was in his barbershop cutting hair when a police officer walked in and gave him a ticket… for cutting hair. The city of Houma, Louisiana, it seems, has a decades-old law banning cutting hair on Mondays. It also bans cutting hair on Sundays as well as several holidays and the days after a few of those holidays. Scott says he didn't know about that law.
No word yet on whether barbershops can remain open on Mondays for barbershop quartet practice.
Image from Flickr user obLiterated available under a Creative Commons license