Depends, if it looks like a 'Visa' or 'Mastercard' it will work, but it depends on the ATM machine. My Wells Fargo ATM only works at Family Mart, my U.S. cities local Credit Union Visa/Debit card only works at 7-11. Other people visiting had to 'hunt' for an ATM that would accept their U.S. debit/credit card. Plus more and more banks will not allow overseas credit purchases (especially cash withdraws) without prior notice to the issuing company.
The more people I meet the more I love my dog.