Jumping in, you might want to try what guys call peacocking. I think one of the reasons Xiomara did better with the retro lingerie is that she stood out. Peacocking is a pick-up technique which involves adding an odd or unique accessory to their outfit to make them different. It makes them stand out and sets some difference between them and the people around them. In my experience, if a girl has a unique vibe, she'll be more intriguing and draw attention. Supermodels tend to have something different and odd about their faces, lead dancers tend to have different colored leotards or something... change your hair color to something wild (but still pretty of course!), or wear some very odd and different shoes (heels? All the girls are wearing heels, how about lace lingerie with army boots!)... along with all the other advice in this thread that should help you be more memorable.
Edit: The British slang too, that's another way to be unique as Johnnie said. If you use voice at all, your accent will be a very big draw to yankees
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