Nik is right my figures are off, but there are 40 million visitors a year and the 2.9 million are mostly located in the Vegas area.
Your perceptions of wealth are also correct based upon overall populations of 10 Million in New York. Scottsdale on the other side of the coin is a more concentrated wealth, every other car is a Bimmer, a Merc, Range Rover, Bentley, a host of Corvettes and you probably see more Ferrraris in a day than in you would in Toronto in a year, so the concentration of wealth is immense.
I would love to go to a Cardinals game but I ususally arrive as the season is winding down and as AZ are usually at the top of the heap, it is hard to get tickets. However the Phoenix Open is a total zoo, with up to 100K people out on the course on an one day. People are dressed like normal golf fans, but you do see a host of folks in Business suites, Women in hooker gear or evening wear, worth at least one visit in your life.