How should gauche be used in a sentence?

The word "gauche" means lacking social grace, awkward, or clumsy. Here are a few examples of how to use it in a sentence:

* Formal: His gauche behavior at the formal dinner party embarrassed his date.

* Informal: It was a bit gauche of him to ask about her salary on their first date.

* Figurative: The stark, unadorned furniture gave the room a rather gauche appearance. (Here, it refers to a lack of aesthetic grace.)

The key is to use it to describe something or someone that is socially awkward or lacking in refinement, either in behavior or appearance.