Since I don't work in air conditioned offices anymore, I find I am more tolerant of the heat.  I use fans in my house to cool me off when I cook and when i sleep.  I wear less clothing and eat less too.
I remember when we never had air conditioners, and only in the movies was it really cool, and that was such a treat.  I love the idea of sitting by the water at night....come out to Staten Island and take the free ferry ride...stay in the front for the best cool breezes in NYC..and then walk our Esplanade for great views on Manhattan.
The other night I was forced to take the train into Manhattan (I live in Brooklyn) and get out at Times Square.  I couldn't help but notice that in this time of unbeliveable heat and impending power outages the city government is asking us to curb our electrical consumption while making no metnion of the fact that this area is lit up like a christmas tree 24/7.  We're expected to swelter in our apartments but the Empire State Building is expected to keep all those beautiful colored light polluting bulds ringing all night long.  You really want to helps the city prevent another blackout? Turn off Joe Camels' 3000 watt cigarette (not even sure of that's still there, but you get the point).  DOn't get me wrong, I'm all for doing what we can as individuals, but ultimately the city has to do what ot can to get business to play by those rules first.

By the way, my wife, my son, and I did exactly like you suggested on Sat.  We took the free ferry out to Staten Island for the first time, and we had a great day, and we stayed pretty cool.