An expensive club in New York City rents rooms only to graduates of a particular university. How is this practice classified?

The practice of an expensive club in New York City renting rooms solely to graduates of a particular university can be classified as legal because it pertains to a private organization that has the right to set its own membership criteria. In many jurisdictions, private clubs can establish their own rules and regulations regarding membership as long as they do not violate specific anti-discrimination laws that apply to public accommodations.

It's important to note that while this practice may raise ethical concerns regarding exclusivity or elitism, it does not inherently violate legal standards unless it discriminates based on protected characteristics such as race, gender, or religion. The club's association with a specific university as a criterion for membership is a form of selective enrollment that is typically permissible within private entities.