joHn from Hull's resurrected thread on hamster power gave me an idea - human treadmill power. Somebody could work out how much electricity could be generated by a person at say one hour on a manual treadmill at an average speed of 3 mph, and we could call that one treadmill-hour, or 1TH. TH's could be credited against your home electric bill, maybe.

Or, at the health club - membership is $15/month or 5 TH.

Or make it a "community service" option like picking up trash or volunteering at a youth center - you could be sentenced instead to 100 hours on the giant treadmill down at the power plant.

Or quid pro quo help for the homeless - one TH gets you a hot shower, a hot meal, and a bed for the night.

Musicians could try to accumulate MH instead, an MH being a music-hour - i.e. an hour spent playing music to entertain the treadmill walkers and keep them walking at a steady pace. Of course, if you were of a mind to play music that had people walking at a 4 or 4.5 mph pace, they could actually generate 1EH in less than an hour, "real" time, and that would be an excellent thing...