Cashiers, already replaced by self scanners, fewer and fewer of them are found in stores, even if you do get hired as a cashier you usually make horrible hours now. Food preparation is another one hit huge by automation, where it's become normal now for companies to announce automated locations (like McDonalds and Taco Bell did last year). Server, bartender, same thing applies. There have already been police officer bots being tested. I mean truly the list goes on, out of the ones you listed really only electrician, construction worker, and mechanic would be hardest to automate.