As it's kinda "cool" here (46F), I'd open with "it's a tit bit nipply, ain't tit".

If you want to go against the grain, make a sarcastic quip regarding some aspect of atire/style. Those of quick whit and thicker skin will respond in kind, those lacking a sense of humor and/or thin skinned will either get defensive, or "run away". A good way to weed out the wieners.