The first question you should ask is: "How common are room coffee makers?".
They are quite common here in the UK (though usually in the form of kettles rather than coffee machines) but much less so on the Continent - so unless your room description says it's got one you can probably assume that it hasn't got one.
Europeans aren't into decaf in the same way that Americans are but you should have no problems buying it in a supermarket - so no need to cart it across the Atlantic