Maybe the correct one is
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place where people, animals or things gather
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place where people, animals or things gather together
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place where people/animals/things gather at a rodeo
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many people, animals, or things
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abundance of people, animals, or things
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a large number of people, animals or things
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place where many homosexual men gather
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group of people, animals, or objects
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become a disordered mix (people, animals, or things)