Couldn't the electric variant convert the energy into electricty? With the guys in the club we many times wondered why we can't use the 8x 250W that are pulled

Couldn't the electric variant convert the energy into electricty? With the guys in the club we many times wondered why we can't use the 8x 250W that are pulled saturday morning to power a microwave oven and everybody gets heated lunch right after the workout? Or use it to drive an AC on a hot summer day.