[QUOTE=das;7780582]This is *EXTREMELY* common. Taxi drivers will even drive you to an ATM to avoid taking your card - I think because their cash flow from the credit card payments is slow. /QUOTE]
Gosh, FTers, don't play so innocent.
In case you hadn't noticed, cash given to cab drivers is effectively untracable and untaxable.

Whereas credit card payments ...
Best advice is above, clear credit card with cabbie before entering cab.