Most Helpful Girl
I think it effects the type of men you attract more than the amount;
Like clothes can reflect a lot of someone's personality; if a guy likes goth type girls, and he see's a girl dressed in goth - he'll be more attracted to her than say a girl who dresses prep.
I'm sure though that if people dress in what flatters their bodies - it can increase more opposite gender attention - but I wouldn't say it'd be significant, unless they had been dressing like a hermit before and actually decided to take more care in their looks lol.
I sometimes think people judge by style too - I've heard some of my guy buds comment on how a girl looks high maintenence if she wears heels everyday - actually one of them called a girl an idiot for wearing heels around campus.
I think it only affects how many men a girl would attract - if she takes extra care in how she looks; I guess that would be being dolled up every now and then and where she's going - like if it's a club setting or bar or something where people are there to mingle more with the opposite gender - I'm sure it would help her numbers.
But we're all dealt a beauty card so if your average looking then you'll attract the average amount of men - or above average etc etc...