London tops the list of cities, with 62,000 Grindr users, which the company proudly points out is “1 in every 60 male Londoners.” Users spend an average of 1.3 hours a day logged on. But nowhere is Grindr more popular than in the U.K., where there are more than 160,000 users, which means, after adjusting for population, almost twice as many gay Brits use Grindr as gay Americans do. Grindr claims its app has more than a million users in more than 180 countries, including Sri Lanka, Djibouti, Haiti, Iraq, and Iran, places where being gay can get you killed. Even at gay bars: cruising within cruising. Could this crude little iPhone app be every single gay man’s dream: to be able to cruise anywhere, anytime? Shopping? Why not! Meet me in Aisle C! Killing time at the airport? I’m sitting at Gate 17. Suddenly, it became clear to me what his excitement was about. And then, “Oh, 413 feet!” Sensing my annoyance, he showed me his phone: dozens of little thumbnail pictures of guys, with little blurbs about themselves, organized from top to bottom in order of proximity. A smart, attractive, chronically single friend of mine had been feverishly fidgeting with his iPhone for half a dozen blocks, somehow navigating the crowded sidewalks without once lifting his gaze from the screen.