I think, for the necessary thrust, they would need a conveyance the same size or nearly, as is in current use. The fuel is needed for the purpose of escaping Earth’s gravity, irregardless of passenger size. However, the interior would be miniature in seating, control panel, etc. That means there would be much greater room to fit several people, food storage, and such necessities.
How fun would it be to float out a tennis ball sized glob of water, and then propel yourself at it, scattering smaller globs everywhere? Better yet, several all at once, and everybody try to get one. It would be like a musical chairs but getting soaked.
Wheeeeee!