I don't think there's a shortage of gun ranges anywhere in the two metro areas, although many of us prefer to simply go out in the desert for our plinking.
As far as suburbs.... the cities here aren't really set up like a lot of places. I live on the far east edge of the valley. I can leave my house and drive surface streets to the far northwest edge of the valley (70-some miles away) and pass through 5-6 cities without ever knowing I left one. You don't really have a central core with surrounding suburbs; you just have one large urban sprawl with some arbitrary boundaries deciding when you're in a different tax zone.
Colleges are everywhere; the Maricopa Community College system (or whatever it's correctly called) encompasses Mesa Community College (~27,000 students), Scottsdale Community College, and several others. Of course, there's also ASU, U of A, and about a million University of Phoenix campuses.