Do not order a half and half by referring to it as a black and tan.
And do not order Irish car bombs. Witnessed an American do that at bad bobs temple bar, he was dragged out and received a good beat down by security.
Be careful using ones like this in hotel bathrooms in Iceland.
They can short the circuit. Happened to our room when my buddy plugged it in.
I use one similar to this in Iceland (been there four times, no issues)