I've always dreamed of making gyms into huge generators... put all that fat to work.
Seriously the only way to free electricity is in a dorm type situation or an apartment with paid utilities. Even then you can't go nuts or it will raise suspicion.
Yep I ran some rigs in a dorm. Although 16M^2 with shitty window restrictor and no space isn't that fun.
If you were to strap yourself to a bike, you wouldn't be able to sustain more than 200W for a few hours. You could peak at up to 3KW in very short intervals though.
3kW would be really impressive -- I max out at 450W and that's really hard. 200W average for an hour would be tough, but doable.
Its humanly possible is what I meant, its what Chris Hoy puts out on the 1st lap.