I sarge at malls and coffee shops. I recently came up with my own opener that's probably been used by someone before, but I thought of it myself.
I have a good friend who I can picture clearly, and see often, I also see his girlfriend often. Picturing these two people is important, because it helps build sincerity on the delivery.
Every set I've opened with this opener has opened well. I use this at locations where it is common knowledge that people have been there for a while, library, coffee shop, beach. (Haven't tried it at the beach yet) It works a charm, just stack.
"Hey, have you seen my friend, he's Kiwi, tall about 6ft with his girlfriend, who's blond, about half a ft shorter.. txt'd me about 6 or 7 mins ago saying they were just around this area"
standard reply, "no", "um.. no don't think so". Haven't struck someone who's actually thought they'd seen them yet, but I imagine that would be easy to transition from.
Next you wanna say "well you obviously haven't been here very long"
*throw in a body rock to convey dis interest, she will always reply here, cut her off and stack forward into your story, cold read, or whatever.
I'm a naturally talkative person, I can stack forward at the drop of a hat.
The opener is a pure hunk of gold, it conveys social alignment, pre-selection, AND MOST IMPORTANTLY FOR DAY GAME OPENING:
A FALSE TIME CONSTRAINT.
peace and use the power wisely
-D