table talk

noun2

1. •
   Conversation, especially of an informal or somewhat gossipy nature, among a group seated together for a meal or other social activity.

   • [T]hey all came out to supper. […] She was also pleased to see how Gregory toned up the table-talk and skilfully led it away from disagreeable topics. — 1874
2. •
   Conversation that illicitly conveys information or suggestions to another player.

   • This then, is my hope: if at least one of us does not talk bridge at the table, the table talk will eventually be lessened. — 2002