Be lucky you Americans can do that. In Germany, impossible.

Edit: The requirement is explained under https://de.wikipedia.org/wiki/Meldeschein for those who speak German. Basically, hotels and similar operations are required to record the data, mainly to properly apply hotel taxes. Side effect: together with the new registration requirement (you MUST notify that you have moved into a new apartment), and landlords actually being liable if renters don't abide, it makes it extremely hard for wanted persons to live in Germany.

Any at all reputable hotel in the US seems to ask for photo id and a credit card for one "responsible" person. Getting checked in without photo id requires some sweet talking (and appearing clearly over 21 in the case of DEFCON).