Is this a vanity? This is exactly out of the socialist handbook and utter poop.
The 20% is if it is EXTRODINARY good service. 15% is standard and anything below that is if the waiter or waitress did something wrong.
If employers are prohibited from calculating the tips then tips should be outlawed ENTIRELY in the food service industry.
a.c.o.r.n. alert
(communist group which uses wage BS to try and register more democrats than republicans. They were caught throwing republican voter registrations in the trash. acorn has ballot initiatives regarding minimum wages.)
All this tip BS is directly from these types of commie groups.