I went a little over the top on this challenge and made a room that uses box colliders to trigger bools in the animator controllers, so that when you get near the door the door opens, and then when you enter the room the directional light rotates, 3d audio source turns on, spot lights turn on, and the characters start a humanoid animation. I also ported this to VR Chat so that it is multiplayer and playable in VR out of the box with no extra work (aside from converting the scripts to be Udon and the materials to be BIRP compatible, due to VR Chat limitations)