Red vs blue, Amazon-style

The arena in Parintins, Brazil, showing both red and blue bulls on the facade before hosting a series of performances to determine the annual winning bull. — Dado Galdieri/The New York Times

THE rift was hard to miss.

At dingy curbside bars, patrons dressed in red sat in red plastic chairs and guzzled red cans of beer. Their rivals, clad in blue, leaned into blue plastic chairs and downed blue cans of beer.