Much like China, US employment laws are laughable and pretty much all CE
- can't enforce. Every service-industry prospective employee puts down that they have "service industry" experience and every service industry-job I had in my teens and 20s in the US was sink-or-swim; there was often some kind of perfunctory training that didn't really teach you much about what your responsibilities were or how to actually do your job and you just had to hope your fellow employees who'd been there a while liked you or you could figure it out yourself or both. and not screw up too much.
If the latter then they just can you when you make your first bad screw-up and bring in the next person in line, turnover is high anyway and there's always another Timmy to make the fries or run the cash register who gives a s*it.
it's kind of a de-facto test of whether you actually have that "service industry" experience, or not. formalizing it is wasted money and effort
25% of new hires will just suck no matter what you do so let God sort 'em out.