A lot of people just ask 'Do you take plastic?' (Of course you could be asking whether they're a recycling centre for plastic toys [], but the context makes the question unambiguous.) Maybe this use of 'plastic' to mean 'credit and/or debit cards' is a British thing, and strangely, it doesn't seem to apply to loyalty cards; if MrsK calls out to me 'Don't forget to take some plastic' as I leave to go shopping, she means Visa or Mastercard - not my TopMan loyalty card (if I had one).