Works for guys in a way, if you have that six pack you need to find a reason to take your shirt off.
The easiest way is asking, according to a college friend of mine.
Of course, it didn’t hurt that he was well-educated, tall, fit, good looking, from an aristocratic Mexican family (and looked and sounded like it).
Easy! According to him, anyway. 
According to my wife, though, his “hole card” was that he had a way of making any women he chatted with feel special.
Several years ago I saw a show where some sex researcher was putting his theories to the test on the street.
In one experiment they took a random guy and put him into a shop window where he couldn’t hear the researcher outside. The volunteer was short, balding, skinny, and had slightly odd features. He didn’t care a lot about his appearence so his hair was unkempt. He was wearing baggy jeans and a baggy sweatshirt. The researcher asked women walking by what their perception was of hte man behind the glass. Most rated him very low. When asked what kind of job the man had they’d pick something low paying. When asked what kind of car he drove they’d pick something boring, if they thought he could afford a car at all.
After the first round of talking the researchers assistants went in and gave him some nice looking clothes and fixed up his hair. They put him back in the window and asked women on the street the same questions. This time most women rated him as being moderately good looking and attractive. When asked about job most picked some sort of business and they picked sports car for the type of car.
So yes, clothes and fashion do give off an indication of class and social standing. It’s a first impression women look for and will be what can let you get your foot into the door. But it’s your personality and confidence that will ultimately decide if she likes you, not your clothes.
I do not think the clothes make the man. There has to be something “special” about a man, in a good way. I love funny people, artistic people, outgoing people.
Come to think of it, no one I have ever dated dressed really “good”. However, the minute we would start being exclusive, out went all the gawdy clothes. I would take it very serious about getting rid of and replacing clothes.
Say, for example, my husband. Not only does he have bad taste, but he is color blind. I made him throw out all his goofy shorts, and ugly t-shirts, with logos on them. I let him come a couple, but he never would wear them with me. He had a bud light t-shirt with frogs on it! Really?
When we moved in together I made him give away his prized budweizer lamp, that could fit a whole window it was so big. I do not think he has ever forgiven me for that one. 
Go to Vegas, walk down the strip until a Spanish speaking gentleman (we all call Curt) hands you several flyers for “escorts” go to your room and have one sent up.
You won’t have to dress at all.
The easiest way to get laid is to lower your standards.
Winner! Just from my experience, you can best tell a gay man by his shoes. At least here in my country.
But seriously, the easiest way to get laid is not in dress or anything about your person. It’s the situation. An all-night disco bar where dancing heats up starting midnight. If you can hold your drink (and money) up to 4AM, you’re likely to bring a (often drunk) girl home.
My wife has often told me something along those lines. I guess that’s why ZZ Top did “Sharp Dressed Man” back in the day. I think there is something about women tending to take a lot of time to look nice for their dates while with guys it’s often more of a “I’m dressed. Whaddya want?” mindset. (Honestly I don’t think I was ever quite that bad but then again…yeah, maybe a little)
Dude? Dude??