Yes, they will take $100s.... and as long as you dont walk up with more than a few thousand dollars it will be OK. I doubt that amounts of up to USD5,000 would even raise an eyebrow.

Forex regulations say that any one person transacting in more than USD50K per month will need to file additional paperwork etc, but its unlikely a visiting tourist would ever get to those levels unless we are talking about some whale gambler, etc.