Being Canadian we seldom carry cash do they accept debit cards ? or just credit cards ? or good old cash ?
Unless you have a specialty credit or debit card every transaction will ne assessed a 3% fee. Better to get money from the bank beforehand.
More useful information about currency I wrote this article to answer some of the questions that people had about currency while in Mexico, and in particular while at Temptation Resort. I originally posted it to the Temptation Cancun Community Facebook page a few days ago, and just got around to cross posting it here. Hopefully this will answer any other questions you had about currency! http://www.cancuncare.com/forum/tem.../28068-temptation-travel-tips-1-currency.html