How to get spanked in public?

So.. I recently got told that there is nothing a spoiled princess could possibly do to get spanked in public. 
So riddle me this...What would happen if you were in a public place with a spoiled princess that you HAVE paddled mercilessly before and:
you were in a coffee shop where no one knew you?
If you were reasonably sure that you wouldn't be harassed over it?
If the only bystander seemed like they would agree totally if you did?
If you overheard the people at the next table mention that you should?
If the waitress suggested it?
If Spoiled Princess stepped UP the bratting, dumped water on your lap and when you gave her crap (and you would) she stuck out her tongue and kicked you solidly in the shin?
If the coffee shop was actually loud, dark pub and the table was sitated where likely no one would even see? Or hear?
If you had warned her.. and warned her... and she just kept mocking your ability to do anything about it?
If the barkeep wandered by, slapped a wooden spoon on the table with a pointed look and walked away?
If she waited until you excused yourself for a moment and ate your meal?
Drank your beer?
Hid your keys?
Told the waitress that you are actually part of the Wild Rose Drag Troupe?
Told the bouncer that you are gay and think he is sexy?
If she handed you an xrated gift and smirked as you realized everyone was watching?
Told the waitress you aren't tough enough to handle her?
If she flirted outrageously with the waiter and when you told her to knock it off she sassed, "Make me!"
If she kept waiting till the waiter was at the table and put her Heeled foot in your lap... suggestively moving her foot and giggling, making no effort to be discreet even.
If she tossed herself over your knee and said, "HA!!! Dare you!!! nananananana!!!"
If she she promised to spend the next four hours as your complete slave if you did?
If she had a new sex toy that she said you could do ANYTING you want with if you did?
If she said no sex for you AT ALL if you don't?
If she asked nicely?
If she promised to do that thing you had asked her to do but she was to shy to do?
If you knew the rewards would be mindblowingly great?
If you just plain wanted to?
If your brother, a police officer, promised to field any complaints if you did?
Could any of those create a sitation in which you would spank her, right there?
Could any of those create a situation in which you yard her to the vehicle, telling the waitress you 'just need to take her in hand'?
Could any of those create a situation in which you might feel that there IS a WAY?

Just saying.. Never say Never
PS. I would NEVER do such things, Really!!