There's a steady car show on Saturday nights at the Pavillions (a ways east of Surprise) - usually pretty big in the winter (not that it's that small in the summer)
Have dinner at YC's Mongolian BBQ, then catch the car show.
There's a new car museum in the Pavillions, too...I haven't been to it, so can't tell you if it's worth the price of admission (or even how much admission is).
