Our local small town cafe did this up until COVID... via a big three ring binder. You could run either a credit or debt as long as it was close and a couple of families i know would do this so their kids could stop and get snacks without cash.
Given the demographics of Woodside, it’s also frequently used by nannies and other family helpers who shop for the uber-wealthy residents who call Woodside home…
Accounts were typically settled at the end of the month. The system is predicated on trust and customer service.