The Mathematics of . . . Pocket Change. Brother, can you spare 18 cents?
This article is pretty cool, but it only reinforces my belief that the penny just needs to go. Even with an 18 cent coin, 24 cents would still an unpleasant amount of change to recieve.
The Transitive Property of Opening Bands: If a band is mentioned, and you've seen that band live, it is a valid segue to suddenly start talking about any of the opening bands you saw when you saw that band live. This association is also commutative, and a mention of an opening band can be used as a segue into a conversation about the headlining band.
Real life example:
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