Sauces, dressings and sides that goes to your meal, to add a bit more flavor.
I have a good friend who is a chef, and he hates to when a guess ask for extra condiments.
It is not a question of being good on what you do, every single diners have a different taste buds.
At the end, you have to make sure that they enjoy what they eat and they leave happy face.
Honestly, for the longest time we both been serving guess, it only happens once.