"How do I talk to/approach a girl I haven't been introduced to in public?"
I see this question a lot, either on this site or from some of my male friends. The approach guys seem to take is either A) do it all the time without paying much attention to HOW they're doing it (thus shooting themselves in the foot by scaring off otherwise interested females) or B) NEVER do it, for fear of being sued for harassment (thus shooting themselves in the foot by never taking a shot with an interested female.)
So! Here is a delightful post I stumbled across that I feel gives some great advice on this topic. Feel free to post any questions in response!
[url=http://kateharding.net/2009/10/08/guest-blogger-starling-schrodinger%E2%80%99s-rapist-or-a-guy%E2%80%99s-guide-to-approaching-strange-women-without-being-maced/]Guest Blogger Starling: Schrödinger?s Rapist: or a guy?s guide to approaching strange women without being maced Shapely Prose[/url]