I knew several African-American males that pledged traditionally white fraternities ... and I always felt kind of sad for them. They were always having to live up to they brothers' most blatant racial stereotypes, and then, were punished for doing so.
For example, one guy was constantly being held out as the chapter "Mandingo" at their parties ... at one event (I attended), he was actually encouraged (in that white fraternity chanting "Whip it out ... Whip it out" sort of way) to pull out his penis to show how well endowed he was.
He didn't do it rather he just laughed along with the "joke" ... reaching for his zipper and turning his back to the crowd.
But, he shared with me that, early on in his membership, he had been shunned by some of the members when he bedded 3 white girls in one evening, at the same time, after one such party chant. He said, his brothers were all at his door cheering him on and editorializing on the sounds coming from inside the room ... until the door opened and "Miss Ann", "Chelsea" and "Becky", walked out.
(Sadly, the lesson he learned was living up to the stereotype was harmless fun ... so long as he didn't slept with white girls.)