I have only been using openers etc for just over a month, and so far i haven't had many unreceptive girls. I really like using opinion openers, best thing about them is you can adapt them to the situation you are in. there are the classics like the cashmere sweater, which is my favorite. have been learning magic to demonstrate values to try and stay in the set for longer.
* esp. judging the situation and/or the person [how she looks, how she behaves] and/or the enviornment/venue/street
* you will also learn that the opener is largely irrelevant anyway
Usually i go for something natural but I've got a friend who's just starting out PU and we've been using the birthday opener.
"guys it was *wingmans* birthday last week"
sometimes they wish him a belated happy birthday if not just launch straight in
"he thinks he looks too young/old for his age, how old do you think he is?"
Fluff and joke around with their answers saying he's not a grandpa or you think he's a kid? Then usually 1 of the set will ask "how old do you think I am?"
At what point you can jump in with Kowalski's (I can find the original post) age guessing routine where you pretty much kino it up prettending you can guess their age from touching hands, bum, anything.