I arrived at 6:45 pm that Monday evening at a nondescript office block in Dalston, a recently gentrified area of East London. I was greeted at the door by the event host, who was wearing a T-shirt that read, "The Offline Club." I handed them my phone, which they stowed in a specially built cabinet-a sort of shrunken-down capsule hotel. The entryway opened into a narrow room with high concrete walls painted white, with space enough for about 40 people to sit.