I dunno, I live in Redmond, WA and see my neighbors regularly. Greeted at least three people on the trail on my run this morning, greeted a few more on the dog walk. I'll probably wave at the neighbor across the street at some point when we're mutually outside. People walk by the house all day long. I don't know how much more suburban you're going to get than Redmond (you have to cross water to even get to the city).

Now, I'll qualify that by saying that Redmond in general is a lot more pedestrian-friendly than a lot of suburbs I've experienced. And in the last twenty years or so, it's also quite wealthy. And seeing your neighbors also entails getting outside. ;-)