Final answer:
The server should stop serving alcohol to the patron and ensure they have a safe way to get home, in line with the establishment's policies and local laws on responsible alcohol service. Servers are trained to handle such situations cautiously to prevent harm.
Step-by-step explanation:
If a server is concerned about the number of drinks a patron has consumed, even if they are not showing signs of intoxication, the server has a responsibility to ensure the safety of the patron and others. The server should consider ceasing further alcohol service to that individual and finding a safe way for them to get home, such as contacting a taxi or a friend or family member. Additionally, the server should be familiar with their establishment's policies and the local laws regarding over-service and might need to consult with their manager or supervisor.
Responsible service of alcohol is critical, and server training often includes recognizing the signs of intoxication and understanding the protocols for dealing with patrons who have had too much to drink. It is always better to err on the side of caution to prevent any potential harm that could arise from overconsumption.