If you want to piss her off, then ask her if she does anal....
Seriously though, I just say no thanks and good bye. Being civil works 99.99% of the time. I use the same procedure in Soho London. most times the wg's will accept this. But I have
been shouted at, called a wog, Then I answer her back. A Romanian wg many years ago wanted me to speed up taking my cash out from my wallet. She was very abusive, so I
answered her back, then told the punters walking up the stairs about her attitude. They all walked away. She lost a lot of money.
The Eastern European wg's do not realise it is a buyers market.