Wombat wrote:
When I was in my early 20's I met a guy whose technique was to walk up to every girl at a party or bar and say "Hey, do you want to have sex with me?"
I said: "My god, you must get your face slapped a lot".
He said: "Yes I do, but very often one will say yes. This saves me a lot of time buying drinks for the wrong woman. If they all say no then I can spend the evening drinking with my buddies."
It makes sense in a crude way.

Ah, the no shame approach. I have a hard time doing it, but for those who can, it's surprisingly effective.
Numbers go up when you're dealing with women alone in public (no judgemental peers)
Go up even more if your approach is somewhat funny and endearing
ex. substitute "do you wanna have sex?" with "do you want to come to my place and play hungry-hungry hippos?"