Chase Field has a sliding roof so if it's too hot, the roof closes and the place gets air-conditioned. Plenty of open air when you want to watch a game outdoors, plenty of air-conditioning when the outdoors in the summer is a bit warm.
There is a hot tub that you can rent on the edge of the field for an unusual viewing location.
This is one of the newer ballparks in the USA and the surrounding area downtown has many diversions. The food and beverages in the park are pretty diverse too.