But the real problem is that the situations you are talking about do not happen when meeting a complete stranger at random in the street; the encounter happens in a tech conference or at work, where you can expect people to be there because of their skills and interests.
Would you ever expect any male to be present in a tech conf not because he's interested in the technology but because he's accompanying someone ? Why is it normal to expect it for females ?
The problem is absolutely not in how women dress/behave/talk/present, it's how the other persons (including other women!) expect something different simply because of their gender.
No.
You're asking too much to be reliable able to look at someone and know if they're open to dating. Given that your target demographic is about 50% of the world's population, the variation is just too large for you to be able to do this. You're going to have to try something else.
Perhaps a polite, friendly conversation and a sustained programme of getting to know them will help you know if they're open to dating.
What utter rubbish.
>Is there a way to look at girl in a cute pink dress and tell whether she is there to just present a tech topic or she is also open to potential dating?
Why are you combining your search for a partner with work/conference. How about you assume no one is there looking for a date?