This is GOLD! Go to your bank and get some Kennedy half dollars. I got 80, forty bucks worth. I used them as tips. Not in place of cash, but a token of someone being extra kind (great service, advice, stories or even directions. Trust you will make someones day and your entire trip. Especially in Galway where John Fitzgerald is considered a saint.
The best $40.00 you will spend on this trip. Kiss the damn stone who cares what people say
Bhoy, perhaps you misread my advice. The coins were not in place of tips, but a token of kindness and a "thanks for you time".