The town of Springfield starts enforcing prohibition after recent events involving alcohol are deemed poor examples for the children. Moe establishes a speakeasy under the moniker of a pet shop to circumvent law.
During Prohibition in Springfield, Homer fills a bowling ball with beer and rolls it down the gutter. The ball makes its way down to a secret speakeasy, where Moe retrieves the beer and charges Barney an absurd price for it. Moe then sends Homer the through the same bowling ball. This clip represents the amorality of American capitalist values, as Homer and Moe's practices benefit themselves but hurt many others with their high prices.