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					Originally Posted by BluPhire  Phi Beta Sigma does not have any recognized little sister auxiliary organization.
 Take that for how you will.
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 Not a Sigma but this is going to be your standard response. GreekChat definitely isn't a way to find out how to find a workaround. 
But speaking on the larger topic of sweethearts, historically they had a purpose. I'm going to go out on a very short limb and say that grad was not the reason sweethearts began to not be recognized anymore. Take a look at what happened between your old heads' time and the present and you'll find your answers.