Joseph, I’m assuming that she means single adults, since her son lives with her. And yeah, singles are expelled from most communities….
j/k – they are not expelled, but they either are nonexistent, or they move out (usually to NY), or they lay low.
There are few communities with single adults. It’s also not such a good idea for a single to move too far from the NY area if he’s dating. Unless possibly if they find another area that has a lot of singles. But even then, it’s probably not such a good idea in general, since you really are limiting yourself.
The only place I can think of in the US outside of NY that might have a lot of singles is Baltimore. I don’t know what the weather is like there, but I would imagine that it’s not so different from New York.