https://www.economist.com/culture/2023/03/23/when-in-mexico-city-try-pulque-a-local-tipple

"In the early 20th century the city boasted around 1,500 pulquerías. That was before big brewers and distillers began a long campaign of demonisation, in which the drink was portrayed as primitive and unhygienic. A false rumour held that excrement aided its fermentation. By the early 21st century, just a dozen or so remained."