Some University of New Brunswick sorority and fraternity members say the school’s decision  to prohibit the Greek community from using university facilities amounts to discrimination.

UNB's sorority and fraternity members were supposed to take part in a student fair on Saturday to help promote their group, but a few days before the event they were informed they're no longer allowed to use university resources or facilities.

On Saturday, they stood outside for several hours in protest.

“They were saying that we're not welcome,” said Marie Meade, a sorority sister with Pi Alpha Gamma.

She believes the reason behind the university's decision boils down to ill-informed stereotypes.

“When you think sororities and fraternities you think parties where everybody is getting drunk,” she said.

UNB's two sororities and one fraternity say they push their members to do better in school and have raised thousands of dollars for charities.

“It's against student rights to discriminate against certain clubs and societies over others, especially since we are recognized by the student union,” said Andrew DeMarco, president of the Psi Lambda Phi fraternity.

In a statement to CBC News, UNB says the decision was made by the university management committee.

It's based on a "substantive body of research in higher education that highlights significant negative impacts associated with Greek letter organizations on university communities,” says the statement.

Since sorority and fraternity members weren't allowed inside these doors at the clubs and societies fair they stood out here for several hours in protest.

The student union says it was not consulted by the university in its decision making.

Sorority and fraternity groups at UNB also have members at Saint Thomas University.

At this point, they can still meet on that campus and use their resources.