A symposium or round-table discussion: an informal meeting where several people discuss a topic.
大学で学術的な座談会が開かれる予定だ。
An academic round-table discussion is scheduled to be held at the university.
その座談会では地域の問題について語り合った。
At that symposium, we discussed regional issues.
座談会には専門家と住民が参加した。
Experts and residents participated in the round-table discussion.