There are always some forums in the Web pertaining to labyrinths.
Therefore it is not necessary to establish another one here.
I only want to show the existing ones.
In German speaking areas is a forum at the website of begehbare-Labyrinthe.de and another one at the website of das-Labyrinth.at.
In English speaking areas is a forum at the website of The Labyrinth Society and another one was at the website of Ashland Web.