I cannot imagine that this has not been posted before, but every Saturday night in Scottsdale, at the Talking Stick Pavilions, there is a fantastic car show gathering. At least from what I have seen online. If anyone has any first-hand experience going to the McDonald's Rock 'n' Roll Car Show (named for the McDonald's right there), please chime in. This looks like an awesome gathering for cars of all types. There is a nice write-up from February 2017, with some good videos, at the link below.

McDonald's Rock 'n' Roll Car Show

 

Yeah, thats been going on for MANY years. If I recall, it's mostly older cars or muscle cars. You may be familiar with Cars and Coffee, the first Saturday of every month up at the Scottsdale 101 Plaza. That's more of the Exotics British cars and some muscle cars.
both are great fun.