iPods: Apple's version of the MP3 player is everywhere. That's great. The problem is solely one of volume. If your iPod can be heard from across the library or you can't hear someone next to you say \hi"" on the street, it's time to reduce the volume.
Bar: Let's start with drunken girls in short skirts dancing alone. The Nac approves of your skirt length and the balls (or lack of balls, because, let's be honest, if you had them, they'd be falling out of the skirt) to dance alone. However, let's avoid at all costs placing your hands on the floor with your butt still shaking in the air. Thank you.
The SERF: There is a simple sign-in sheet system. One writes one's name on a sheet and waits. One does not stalk to current user of a desired machine repeatedly asking for the amount of time the current user has remaining.