Everybody is sitting at the table/tables?
How may you express the idea of "there are some people and some tables and every one is sitting at one's own table", but using the word "everybody"?

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Everybody is sitting at a table.

Everybody is sitting at their own table.

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Everybody was seated, with each person sitting at his/her own table.

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Although there were many seats at various tables, each person chose to sit alone.

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I see, that we can do it only having added the  "their own". I wish to thank every one of you for the help.