STATE COLLEGE, Pa.—About two dozen Penn State students have used the uproar over an offensive sorority photo to call for better recruitment and retention of Hispanic students and faculty at the school.

The group "PSU For All Student Equality" gathered Thursday at the campus administration building after a short, peaceful march. The walk came a week after a picture of sorority sisters at a Mexican-themed party went viral on the Internet.

The sisters wore fake mustaches and sombreros. A sign in the photo says "will mow lawn for weed + beer."

Student organizer Manuel Figueroa says the picture was a catalyst for an event focusing on broader issues of social inequality. He says he'd like to see a school-wide ethnic studies requirement.

The Chi Omega sorority has apologized and is on probation.