Answer:
Emotion work
Explanation:
In psychology, the term emotion work refers to the act of inducing or inhibiting feelings so as to render them 'appropriate' to a situation. In other words, this term refers to emotional management and it's an effort on managing emotions in social relationships.
In this example, servers are paid to be nice, pleasant and courteous. They are in contact with clients in a regular way and therefore they need to have appropriate feelings according to the situation and they need to manage their emotions especially when there are problems with the clients. Cooks are not in contact with clients so they can be loud, vulgar, insensitive and rude. Thus, the part of a server's job that doesn't apply to a cook would be emotion work.