According to Official Guinness Records,
The most people playing bunco simultaneously is 1,599, achieved by Addicted 2 Cuffs (USA), in Tulsa, Oklahoma, USA, on 24 February 2016.Addicted 2 Cuffs is a group that comes together in appreciation of Rustic Cuff, a brand of jewelry in Tulsa, Oklahoma. The attempt took place at the Renaissance Tulsa Hotel and Convention Center.
For a complete list of 2016 records, please visit 2016 Guinness Records in United States.