In The Appaloosa Brando ingests a little Pulque (a repulsive sounding brew) in a small Mexican cantina - obviously frequented by Mexican banditos
(aren't they all).
But he smarts his way out of a potential fracus with some nice double talk
... then rides on.
MFW: Pulque - in it's several variations is actually said to have some medicinal qualities - with or without flies.
Excert from "Tequila's mystical ancestor, pulque, produced since Aztec times":
"Pulque is like beer - it has a low alcohol content, about 4-8%, but also contains vegetable proteins, carbohydrates and vitamins, so it also acts as a nutritional supplement in many communities.
Tequila's predecessor, pulque, was made from as many as six types of agave grown in the Mexican highlands ... Pulque is one of about 30 different alcoholic beverages made from agave in Mexico - many of which are still made regionally, although seldom available commercially. Pulque has remained essential to diet in the central highlands of Mexico since pre-Aztec times."