A lot of the Northeast normally doesn't need air in the summer, except for a few days.
No central air. As PP mentioned it's just not justified. We do have a window A/C in the bedroom so the kids and I mostly hung out there yesterday. Most summers we only run it about 5 or 6 days - the last few days have been the only ones where temps hit 90 or higher. Right now it's 70. The biggest problem is when my house gets hot it gets really, really hot and stays hot - thus the melted chips.
My mother lives on Cape Cod and I lived there for 6 years. We definitely need A/C in the summer!