green table
/ˌɡriːn ˈteɪbl/noun
1A table covered with green cloth and used for board meetings, negotiations, etc.; (hence) one of the boards of Covenanters who ruled Scotland 1638–41 (now historical ).
2A gaming table.
Origin
Mid 17th century; earliest use found in John Spalding (b.?1624), historian. From green + table.