Final answer:
A good practice when refusing alcohol service to an obviously intoxicated patron is to offer alternative beverages.
Step-by-step explanation:
A good practice when refusing alcohol service to an obviously intoxicated patron is to offer alternative beverages. This allows the patron to still enjoy a drink without consuming more alcohol.
Persuading the patron to drink slowly is not advisable as they are already intoxicated and should not consume more alcohol. Providing free alcoholic drinks for their friends would enable more alcohol consumption, which is not responsible. Ignoring the situation is also not recommended as it could lead to further harm.