Final answer:
A hostess should warmly greet the elderly gentleman using a walker, offer him a conveniently located table, and ask if he needs any assistance, being mindful not to make assumptions about his capabilities.
Step-by-step explanation:
When an elderly gentlemen using a walker comes into the restaurant, the hostess should respond with courtesy and awareness of his potential needs. It is important to provide support without making assumptions about his abilities. The hostess should warmly greet him, ask if he prefers a table that is easier to access, and inquire if he needs any assistance. This approach is respectful of the gentleman's autonomy while also being attentive to his comfort and safety. The hostess might also ensure pathways are clear of any obstacles to facilitate easier navigation with his walker.