So you've been having a few wins, bankroll is building nicely to the point where you've won enough to take the missus out for a night on the town.
Do you:
a) do the sensible thing - withdraw the cash & earn some brownie points with the wife, or
b) let it all ride?
I went with option b. on this occasion.
http://www.youtube.com/watch?v=sW-EDfjlkjE
And didn't get the result I was after unfortunately!