Places to retire to in Nevada

Lake Havasu City seems nice.  I visited there once when on vacation and thought is was pretty neat.   We visited the casinos, saw the London Bridge and went to an English pub right by the bridge and enjoyed a Pims cup.  But is was 122 degrees (no kidding) so you would have to like the warm weather.  The Colorado river was beautiful.  Does anyone know of an neighborhoods in the area suitable for retirement?

I heard some of the ghost towns in Nevada were now being reclaimed by Seniors? Anyone have any info on which towns these are.