Bangladesh, Nov. 29 -- For decades, Marbella has thrived on its carefully curated image: a Mediterranean playground of gleaming supercars, champagne lunches along the Golden Mile, and palatial villas tucked into the foothills of the Sierra Blanca. The citys reputation for glamour, money, and excess has long attracted the wealthy, the infamous, and everyone in between. But in recent years, Marbellas pristine beaches and sun-soaked marinas have drawn an entirely new class of visitor: a community of male influencers, self-styled entrepreneurs, and self-help ideologues who orbit around the sprawling constellation known as the “manosphere.”

Once a largely online phenomenon, the manosphere – a loose and often troubling networ...