So I was looking around Quark's Bar in DS9 and couldn't help, but be bothered by the dart board. It's upside-down! Could someone right it up? I mean anyone who plays darts knows that the 20 should be at top.
edit: Those dart boards are held up by an off-center screw, which allows them to be right-side up. This is completely impossible because of the simulated gravity on DS9.