> You did a post about grabbing ass now write one about tits.
Don't do it.
For some reason it freaks girls out far more.
What you do instead is follow the ass-grabbing route and as she gets warmed up hold her at an angle of about 90 degrees in front of you and she's very likely to start rubbing her tits on your arms and chest herself...
You still don't grab but if you like you can make it clear you've noticed and approve.
The most you can do in public; if she's rubbing hard, is to raise your arm and weigh her breast on the back of your wrist, not your hand, and only for a moment before making a complimentary comment or pulling her close. Follow up by pulling her home NOW.
You get to grab in private later.