Sentence examples for a fraternity from inspiring English sources

The phrase "a fraternity" is correct and usable in written English.
It can be used when referring to a social organization of male students in a college or university, or more generally to describe a brotherhood or group with shared interests or goals.
Example: "He decided to join a fraternity to build lasting friendships and network with other students."
Alternatives: "a brotherhood" or "a social club".