The door greeters act like the cell membrane would in a cell. The door greeters are permeable and let people in and out.
The nucleus is the "Brain" or center of the cell just like the managers office in a restaurant.
The Golgi Apparatus ships proteins to the nucleus just like a waiter takes your food orders and ships them to the Kitchen.
The lysosomes in a cell consumes the old organelles and waste like all the trash and leftover food goes in the dumpster at a restaurant.
The Cytoskeleton would be like the foundation & Structure of the restaurant.
The ER moves things around the cell to where they belong just like your host can move people around the restaurant to where they are supposed to be.
In a cell the mitochondria makes the food for a cell like the kitchen in a restaurant is where the food is made and prepared.
In a cell the ribosomes make the protein for the cell and send it to the nucleus like the table bussers in a restaurant make the table clean and ship the old dishes back to get cleaned.
The cytoplasm would be like the floor in a restaurant.