Gym truck

There are many unfit people living away from large population centres with no access to gym facilities. If one were to fit out the storage area of a large truck with suitable fitness equipment, the gym could go to them. One night a week per town/ village, and people can come in and get fit. You could even hook up with the local GP and offer discounts to the serious fatties. There'd be no need for showers/ changing rooms etc. cos you're pulling up virtually at someone's front door. A real service to the community.