Soccer fans are tuning out broadcasts in favor of watchalongs: streaming parties where you hear what you want to hear and see everything except the game.

With the lights adjusted and the cameras rolling, the production team gives Joe Smith his cue. In five seconds, he will be broadcasting live to a couple thousand people. Mr. Smith’s mind, though, is elsewhere. “Slate is definitely the best way to build a roof,” he mutters to his co-host, Jay Mottershead, as the countdown hits three. “All these years on, they haven’t topped it.”

And with that, they are on air. They will remain so for the next four hours, essentially uninterrupted: a broadcasting endurance test staged in a subterranean studio, all exposed brick and industrial lighting, in the middle of Manchester’s achingly hip Northern Quarter.

Before they have finished, they will have touched on subjects as diverse as: the slightly alarming frequency with which Mr. Mottershead has nightmares; the declining popularity of lemon curd; and the story of a man who attends Mr. Smith’s gym exclusively to read vintage copies of “Cars” magazine.

Occasionally, their freewheeling, faintly anarchic conversation to be interrupted by what is supposedly the purpose of the evening’s activity: keeping track of the game between the soccer team they support, Manchester United, and the Danish champion, F.C. Copenhagen.