No joke, my friend fresh out of the 24/7 Attractive Masterclass did that exact same thing. AND IT WORKS!
"Smile!" smiles in turn and even brings thumb and forefingers to corners of his mouth
Girl giggles, game begins.
According to him, one of the main things he learned is that an easy opener to come up with is the obvious and the relevant. He told me of a time he was practicing street game during the camp in downtown Chicago. Just to get him used to talking to girls, the instructor tells him to just say, "hey! Do you know where the Sears Tower is?"
it wasn't meant to be compounded with any other parts of day game. Just practicing "hey" and initial talking, and he still got an array of near insta-dates and phone numbers.
After that, he told me that he never ran out of good openers, because none of them were ever canned. He just used the obvious and the relevant.