Where I can find a guide to the laws of the United States? Many laws are different between Brazil and United States:
- Minimum age to drink alcoholic drink. in Brazil 18 years.
- In Brazil is allowed to drink in public
(This is not legal advice.)
Wikipedia normally provides an adequate summary of countries' laws and regulations in common areas of interest to travelers, such as motorcycle helmets and drinking age.
For example, a Google search for [drinking age in usa] returned the "Legal drinking age" Wikipedia page as its first result. A similar page exists for drinking in public, namely "United States open container laws".