Final answer:
Providing a customer with a dry napkin is indicative of good etiquette and professionalism, be it at a restaurant or during a networking event where business cards are exchanged.
Step-by-step explanation:
When it comes to attending to a customer, professionalism is key. Whether you're setting a dining table in a restaurant or attending a business meeting, offering a dry napkin signifies attention to detail and care for the guest's comfort. For diners, the napkin should be placed on their lap upon seating. This gesture is not only part of proper etiquette but also immediately addresses any need they might have to clean their hands or protect their clothing during the meal. Similarly, in a business setting, keeping your networking cards clean and accessible at all times is equivalent to keeping a dry napkin ready—it shows preparedness and respect for potential contacts you meet.