Those are busboys. They bring clean and dirty dishes back and forth from the kitchen.
Capital investment.
Irish whip them to the table and then move the right joystick (or whatever you call it) up
fold-out tables
Good food and good ratings good people!;)
An automotive detailer.
A group of tables can be referred to as a "set of tables" or simply a "table collection." In specific contexts, such as data management or databases, it might also be called a "table cluster." In casual settings, people might just say "tables" when referring to multiple tables together.
sanitizing technician
Call the restaurant you would like to go to and ask to make a reservation for a time and tell them how many people you are going to be with and your name.
People book a table at online booking restaurant sites so they do not have to call and make a reservation.
Carpenter
not sure but just use street cleaners....
I call it a "chisel"