[ponector]

Also a tip goes to the pretty face who bring you plates.

However, the whole restaurant experience is made by many people: dishwasher boy, prep boy, shef, cleaning lady, etc.

They should tip to cleaning lady as dirty toilet can ruin whole "experience".

[ImJamal]

In many restaurants the tip is split between all of those people. You just don't know it because they don't exactly post their tip policy.

[ponector]

I've heard about shared tips between people who work around the tables, but not with dishwasher/cleaner.