Walking up and saying hello usually does the trick.
When dealing with a very attractive woman, once you get "in the club" and bang one they don't seem so intimidating.
But there are requirements...You have to be either good looking, fuck good or have money. That "funny and charming" crap only works until they find out you are a funny and charming loser with nothing to offer.
I don't have money, so two outta three is okay.
Another thing one can do, stop at a busy downtown light, rev the engine of your Lambo, all heads will turn, but you must either have a nonchalant look or that devious look and laugh,and a hot chick of your choosing will fall into the passenger seat...
Oops I forgot, that requires having money, or rich friends.