Our basement is generally below 70 degrees and lately with this high humidity we have been having it has been so great to go hang out down there. I am pretty happy that we made a play room in the basement for my daughter, because I think we will be playing around down there a lot this summer (whenever we are not at the community pool).
The more we hang out down there, the less concerned we get with the heat and/or humidity upstairs and don't feel the need to turn on the A/C's. The longer we can keep the A/C turned off, the less electricity we use. And we all know the goal is to cut down on our electrical consumption & save some green.