"Government bodies must spell out the business they will take up in meeting notices when they consider issues of broad public interest, the state Supreme Court ruled Wednesday."
http://www.jsonline.com/story/index.aspx?id=619769
Washington's Open Public Meetings Act does not require an agenda, let alone an agenda with enough information to inform the public of what the meeting is about. So in Washington the public can attend a meeting ... but cannot require the agency to tell them what the meeting is about.