It is against the law and local town ordinances to drink any alcoholic beverage in public areas outdoors such as streets, parks, and beaches. The law is to discourage public drunkenness. If you are discreet, you can usually have wine or beer quietly with your picnic.
In Maine, blue laws prohibit the sale of cars on Sundays. The law prohibiting hunting on Sundays in Maine may also be considered a blue law. Furthermore, blue laws prohibit many large stores from opening on three major holidays: Christmas, Easter and Thanksgiving.