This is a new etiquette problem for the 21st century... It involves waiting for those drive up ATM kiosks. If there are more than one, do you wait in a single file and wait for the next available one, or do you pull up to one and take your chances? Me, I wait in single file, UNLESS someone pulls up behind me, then I pick one and take my chances. I've had people honk their horns at me, or just drive around me rather than wait in single file (I think they were just rude). I think that waiting in single file actually makes sense, some might disagree.