5 out of extended family. We have 3 adults and 2 dcs in our household and no one drives. My 2 sisters don't and my older nephew doesn't. We all live in zone 1 London so cars are rarely used even if they have a licence. In my household, two of the adults have disability Freedom Passes (means free travel all day throughout London on almost all routes) and all dcs travel for free on public transport in London, so we only ever pay for one adult, so the cost of using a car would always be more expensive.