The professional titles of waiters generally vary according to different industries and workplaces. The following are several common waiter titles: 1. Restaurant waiter: People who work in restaurants are usually called waiters, restaurant waiters, restaurant employees, etc.

2. Hotel Attendant: People who are engaged in reception and room service in hotels are usually called hotel waiters, room attendants, receptionists, etc.

3. Coffee shop waiter: People who work in coffee shops are usually called baristas, coffee shop waiters, etc.

4. Etiquette waiter: People who engage in etiquette services at banquets, weddings and other occasions are usually called etiquette waiters, banquet waiters and so on.