The Do’s and Don’ts of Cinco De Mayo:

The Do’s and Don’ts of Cinco De Mayo:
  1. Do get yourself a bomb-ass margarita…or seven.
  2. Don’t wear a sombrero at any point during the consumption of the margaritas.
  3. Do support Mexican businesses. 
  4. Don’t wear a serape.
  5. Don’t bring, purchase or shake maracas.
  6. Don’t push it to the point where a fake mustache anywhere near your face/body sounds like a good idea.
  7. Do partake in a Cinco de Mayo bar crawl.
  8. Do let tequila work its magic on you.
  9. Do seriously feel free to push it and have a great time.
  10. Do enjoy another culture’s music while you’re out.

https://www.history.com/articles/cinco-de-mayo