The standard greeting here is "grützi", but just to be extra confusing, there are endless variations on this (I'm not sure if any of these are spelled correctly): grützi abend, grützi wohl, grützi mittenand, etc. The most common seems to be grützi mittenand, so we've taken to saying it to people. Well, I finally found out that's what you say when you're addressing more than one person. So every time a person has said grützi mittenand to us when we're together and we've responded back with grützi mittenand, they must have thought we were idiots for addressing them in the plural. (And don't get me started on how confusing it is when someone speaks with you in German, then says "merci" and "adieu" as you're leaving...)