The life experience that best connects to the theme in the excerpt is "moving to a new school where you do not know anyone."
In both situations, there is a sense of navigating a new environment and feeling uncertain about social dynamics. Alice's nervousness about the guests and her discomfort at the table reflect the feelings one might have when entering a new and unfamiliar situation, such as starting at a new school where you don't know anyone and have to figure out how to fit in and make connections.