Final answer:
At a dinner party, one should refrain from smacking lips while eating, arrive on time, accept the offered food within reason, and sit according to the host's arrangement as marks of good etiquette.
Step-by-step explanation:
At a dinner party, one should always be mindful of proper etiquette to ensure a pleasant experience for all guests and hosts. Among the actions to avoid, one should never smack lips when eating as it is considered rude and can be disturbing to others. On the contrary, one should accept what is offered, unless dietary restrictions prevent it, as a sign of gratitude and respect towards the host. Additionally, arriving at a dinner party on time is essential, as being late can disrupt the flow of the evening and be seen as disrespectful. Finally, guests should sit where placed by the hostess, who often strategically arranges seating for social or conversational reasons.
Understanding and respecting dining etiquette, such as when to place the napkin on your lap and how to respond to toasts, will contribute to a harmonious event and prevent any faux pas. Addressing every aspect of dining etiquette, from the appropriate response upon receiving a toast to the correct behavior at the table, is key to being a well-regarded guest and enjoying the event to its fullest.