A sign alerts customers that cash is not accepted at a shop in San Francisco last year. The city subsequently banned businesses from rejecting cash.

A sign alerts customers that cash is not accepted at a shop in San Francisco last year. The city subsequently banned businesses from rejecting cash.

A sign alerts customers that cash is not accepted at a shop in San Francisco last year. The city subsequently banned businesses from rejecting cash.

A sign alerts customers that cash is not accepted at a shop in San Francisco last year. The city subsequently banned businesses from rejecting cash.