Leitungswasser

Last night C and I went out to dinner. I don't order bottled water in the US so why would I start in Germany? So I asked for "Leitungswasser" - tap water. Or, literally, "pipe water." Afterwards, a woman at the next table leaned over and asked C, in German (so I'll paraphrase) and quite incredulously, if we really ordered tap water and if they would bring it to us - for free! Seems like I've started a trend here!