Top 10 indicators you should NOT eat at a restaurant.
Tables are dirty
Restaurant does not smell clean
The menu is crazy large, most likely all the ingredients are not fresh.
The staff is not curtious nor knowlegable.
The food is cold - that means it's mostl likely re-heated / pre-cooked with lots of preservatives.
The server is NOT knowledgable about the menu.
Seeing open tables at the restaurant and being told by the host or hostess that you have to wait one hour.
The menu is NOT diverse / limited, does not include at least one vegitarian option.
Seats are NOT clean