My son (age 21 and a half years) and I (63) wanted to visit a bar in Utah near Salt Lake City. The first time my son was rejected because he had "only" the German ID card. O.K., no problem, we returned to our hotel (0.7 miles away, by walking) and brought the German international passport (Reisepass), which we also used on the border to enter the US. However, he was rejected again. We will avoid visiting the state of Utah in the future. Does anybody have an idea if this could also happen in a different state?
Varies from bar to bar; the ones I've been to in New York and LA never had any issue with my Swedish equivalent of your Personalausweis, but I've read that many places won't even accept driving licences not issued in their state. Effectively meaning many places are only open to local residents in practice.