Your obvious cleaning suspects are maybe the first ones to go. Most of the floor cleaning nowadays is done by people operating some sort of cleaning vehicle. Also, most niche cleaning jobs requiring more detail won't be replaced by robots soon. Truck and bus drivers will probably go as well, maybe in 20-30 years. Until then, this sector is just going to get more regulated with electronic log books, dynamic weight checks, satellite tracking and such. Waitresses I rather doubt will go away doring my lifetime.