They don't have to compete. They can entertain.
When I was in school (the only group affected), KKY entertained the crowd while the judges deliberated.
At the last home coming step shwo I attended, a church group from the Midwest was invited to do the same.
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ALPHA KAPPA ALPHA SORORITY, INCORPORATED Just Fine since 1908.
NO EXPLANATIONS NECESSARY!
Move Away from the Keyboard, Sometimes It's Better to Observe!