Final answer:
The final step in the greeting and seating process at a dining establishment is when the guest receives a menu. This indicates the start of their meal selection.
Step-by-step explanation:
The final step in a casual or fine-dining guest's arrival, greeting, and seating process occurs when the guest receives a menu. After being welcomed with a warm greeting and shown to their table, the guest is provided with a menu, marking the last stage of their initial dining experience. This step allows the guest to begin making decisions on what delicious dish they might enjoy while taking in the ambiance created by soft music and the hustle bustle of the dining area.