Largest sales lesson (single venue)

According to Official Guinness Records,

The largest sales lesson consists of 5,638 participants, achieved by Dirk Kreuter (Germany) at the event Dirk Kreuters Vertriebsoffensive, in Dortmund, Germany, on 16 June 2018.The lesson took place at a weekend long sales convention.

For a complete list of 2018 records, please visit 2018 Guinness Records in Germany.

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