Do they accept Canadian currency

No Canadian cash. Debit and credit yes

No but you can trade it at an currency exchange

Cards yes, cash NO

I'm not for sure

No Canadian cash accepted there

ONE NO

They do not. But they will take debit or credit cards. You can always look for a bank machine in Canada that spits out US currency. Just plan your trip.

It's usual in Niagara Falls for sales to take Canadian Dollars, but there are exceptions found.

No sorry but there are plenty of banks.

No. Only American Dollars or card