Final answer:
Whether a guest can substitute a side salad for soup and if there's a charge depends on the restaurant's policies. Some establishments allow it for no extra cost, while others may charge a small fee.
Step-by-step explanation:
Whether a guest can switch a side salad for a soup with their dinner special, and if there is an additional charge, depends on the restaurant's policies.
In some cases, an establishment will allow such a substitution at no extra cost, while in other situations, there could be a small fee.
It is best practice to ask the server or refer to the menu for substitution rules before making a decision. For instance, a menu might list that a substitution of soup for a side salad could incur a $2 surcharge.
Always check with the restaurant to avoid any surprises when the bill arrives.