If it gets AT ALL WARM where you live, AC is a NECESSITY. ABSOLUTELY.
Let me just add...I drove my car in 80-90 degree weather for about two weeks before I hooked up the AC. It was borderline miserable. I opened the door at every stop sign, every light, and anytime I thought I could get away with it. On a race track, with every vent open and a cool shirt, I might consider driving without AC. But on the street...no way. And don't expect anyone to want to be around you afterwards, either.