And since everyone has different types, then it requires actually talking to a woman to find out if there is any chance of her going home (or wherever) with her to begin with. I've been hit on in my coveralls on the ship for Christ's sake. (Of course my husband claims that they look good on me. But then again my husband jumped me once when I came back to my hotel room in blue cammies. Don't think that would be true for every woman or every guy.)
It is all about preferences, and not all guys share the same preferences, nor are all guys going to have enough going for them to get that ok to get near the woman. In order for there to be some sort of "misunderstanding" of intentions when we are talking a bar type pickup, the girl is going to have to at the least be talking with the guy or something. It isn't likely that there is a misunderstanding if there isn't any communications between the two to begin with. Heck not all guys are going to even be attracted to the scantily clad woman for sex. Some may figure she is too loose. Others may just not want to take any risks (whether that assumption that she would be a risk is warranted or not). Some simply would rather have the more subtle woman.