One recent afternoon, I arrived at the London Palladium to a disappointing scene: The West End’s most talked-about seats were already taken.

Outside on the street, not far from the theater’s grand entrance, two men had perched themselves on the seats — actually piles of cardboard awaiting recycling — to get a perfect view of a scene that has London’s theater scene buzzing.

In a few moments, Rachel Zegler, the actor playing Eva Perón in a revival of “Evita” at the Palladium, would appear on a balcony and belt out “Don’t Cry for Me Argentina,” the show’s signature song, to the hundreds of musical lovers, celebrity spotters and confused tourists gathered below.

The audience inside, some of whom had paid 240 pounds, about $327, for seats that weren’t made out of trash, would be watching her on a big screen.

Adam McCollom, 41, an academic who had scored a spot on one of the cardboard perches, said that Zegler’s street scene was apt for a musical about Perón, the wife of Argentina’s socialist president’s who was adored by the working classes. “Here I am, the pleb on the bins, about to clap the woman who’s paid billions,” he said.