The room consists of 3 cacti and a sign in the middle that says the next art club meeting is on October 10th at 8 pm. A sign can be found in the black space next to the hallway in MTT Resort advertising the room.
This room is inaccessible on the Genocide Route due to the second floor being blocked off by a force field. By using unconventional means such as the debug menu, it can be accessed on the Genocide Route.
A secret boss, So Sorry, can be encountered here. To do so, the game must be launched while the player's computer clock is set for October 10th, 8 P.M. Additionally, Hotland must have been cleared up to the MTT Resort. If these conditions are met, reading the sign will cause So Sorry to run into the protagonist, initiating his encounter.