You should order a pair of Ambrosia http://en.wikipedia.org/wiki/Ambrosia Godot Pants - The Most Perfect Pant in the Whole World. You will feel very light and airy for the 12 months it takes for them to arrive.
A Bunga Bunga party at the Berlusconi pool will be light and airy or light and hairy depending who you are looking at.
Black suit is good but I'd reverse the tie and shirt - plum shirt and white tie.
Man, good luck with that, I took a seersucker jacket with me last year and didn't wear it in the evening cause of the heat. Black suit in the day? I'm sweating like a pig thinking about it.