Fun ideas to use at a grocery store around girls:
Scenario: You notice a girl looking down each aisle.
Me: Ice Cream is on Aisle 5.
And she'll respond with either a "Huh?" or a chuckle if she gets that you're joking. If she says "Huh," just tell her that she looks lost and take it from there.
Scenario: If you're standing in line and the girl next to you girl has ice cream in her cart, just give her a neg about watching gaining weight. Do not do it to fat girls, do it to girls who look to be in pretty decent shape. I saw this girl who was in running shorts standing in line holding a tub of ice cream, and I said "Do you run so you can eat ice cream or are you eating ice cream because you ran today?"
And if you're standing in line and the girl next to you does NOT have ice cream, just ask, "Where's the ice cream?" And she'll either respond, "I already have some at home," or something about watching her weight or diet.
If she says she already has some at home, just say, "I barely even know you and you're already inviting me to your house for ice cream. I like ice cream, but I'm not that easy. Tell me something about yourself that would make me want to get to know you better."
And if it's the diet or weight response, tell her "It's about time you did something about your diet." And again, do it to girls who look like they're in good shape.
And if for some reason you have a hard time making conversation after that opener, ask her what her favorite ice cream is. If it's some obscure flavor, make fun of her for having weird taste. You can also go in a pseudo-cold reading by saying, "You can tell a lot about a person by their favorite ice cream." And tell her about her by her ice cream. And depending on how long the line is, you can mention palm reading and hand writing analysis as well.
Just some ideas. I haven't had a chance to use them all, but they seem pretty sound (neg, cold reading, playful banter), and ice cream is a fun topic to discuss with girls because most girls like ice cream.
BobbyJ