What is the grace period allowed for customers to finish their alcohol beverages once liquor service has been discontinued?

The time given for patrons to finish their alcoholic drinks after the establishment's final chance for service is often called last call. The length of the grace period may vary depending on the regulations set by local authorities or the policies of the establishment itself, but it typically ranges from 15 to 30 minutes. During this period, customers are expected to finish their beverages and leave the premises in an orderly manner. Any unfinished drinks may be discarded by the establishment, and customers may not be allowed to take them with them.