Pick a sexy stereotype: a rocker, maybe? Your choice. Google some the rock stars you know and see what they wear and downright copy their style. For a rocker, earrings work great. also get a new haircut, get a ton of accessories. Choose the ones that really hit you, that way your conveying more of your personality.
I think it's better to be really stylish and go overboard with that stereotype of your choice than to REALLY peacock wearing something really outlandish

Also, if you want a GREAT opener to use. put on your best clothes and go ask girls their opinions. be ready to listen and learn, maybe you'll get a cute girl go shopping with you. It's really attractive to a girl if a man is interested in fashion and willing to learn from girls.
But then again if you're congruent with the peacocking, meaning that you can have fun with it, of course it works. I was at this party a while ago where there was 2 guys wearing pink elephant costumes. The two guys were dancing and laughing their asses off at their costumes, and the girls were all over them.
So: pick a sexy stereotype OR wear a pink elephant costume
