A round of Zentarskys
Is a set of Zentarskys - plural of Zentarsky, more than one - purchased by an individual in a group for the entire group.
Waiter asks the table - “Any drinks or appetizers for the table?”
Customer - “ Let’s start with a round of Zentarskys for the table”
Customer - “ Let’s start with a round of Zentarskys for the table”