table talk

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Casual conversation around a table, as during mealtime or a card game.

from The Century Dictionary.

• noun Familiar conversation at or around a table, as at a meal or an entertainment; what is said in the free intercourse between persons during or after meals.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

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

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun conversation during a meal