Why isn't there a Grindr for straight people?

Tinder is not the straight Grindr and never will be – so why are there not more venues for straight people to have casual sex? Moira Weigel investigatesMy friend – call him Henry – thinks that we should start at the Equinox gym. But I don’t have a membership and another friend is insisting that we have to check out the Whole Foods on East Houston in Manhattan.
I’m intrigued: it had never occurred to me that a grocery store would make a prime pick up spot at 6pm on a