Mark Zuckerberg -- When the Tip Just Isn't Enough
Mark Zuckerberg When the Tip Just Isn't Enough
![](https://imagez.tmz.com/image/01/16by9/2012/05/30/01c3c164a0c852d4aa8e95bcf25e6918_md.jpg)
Mark Zuckerberg's billions keep shrinking -- poor guy -- but is that a good excuse to skate on a tip after a romantic dinner in Italy? Depends on who ya ask ... and if you're any good at converting dollars to euros.