Including, but not limited to, "any office, department, board, bureau, commission, agency, trusteeship, authority, council, committee, trust or any entity created by a trust, county, city, village, town, township, district, school district, fair board, court, executive office, advisory group, task force, study group, or any subdivision thereof, supported in whole or in part by public funds or entrusted with the expenditure of public funds or administering or operating public property, and all committees or subcommittees thereof.