talking shop
From Longman Dictionary of Contemporary Englishtalking shopˈtalking shop noun [singular] British English a committee, group etc whose job is to discuss and solve problems, but who do not achieve any actionExamples from the Corpustalking shop• Parliament is a talking shop where members seek to influence others by debate.• The Commonwealth is simply a talking shop.• At the moment the annual summit is little more than an expensive talking shop.