To many New Yorkers, the suburbs are out there: an indistinguishable gray haze radiating outward from Central Park. “People just randomly do Internet searches and end up buying who-knows-where,” says Alison Bernstein, an equity-derivatives analyst who went through the process herself. Bernstein recently started Suburban Jungle Realty, a service that matches city dwellers with specific towns. She interviews clients to find out their must-haves and deal-breakers, and then, like other matchmakers, sets them up with a few places. (Unlike most yentas, she often tags along on the date.) “There’s no algorithm,” she says. “The community has to make sense for the clients. But it has to feel right. There has to be chemistry.”