I don't think a date has been set to remove the lobby warp signs. Since Saturday is Halloween, I am confident the map will still be available. Have fun with your friend!
We all had a wonderful time playing on the Samhain Halloween Adventure Map you created @LifeLearner. Thank you for that very much! A few of the SVS regulars got together and took some selfies with the Halloween themed Sandlot sign the other day. Hope everyone had a fun and safe Halloween this year.
