Where: Hackanoogie Prison. When: Who cares?
The Master Key Keeper had had a really good day and in a fit of insanity and niceness decided to let all the inmates to go free if they manage to carry out the following task.
"Guys", he calls over the P.A system (it's very informal there on Tuesday mornings) "During the night the Key Keepers were extremely bored and crept into everyone's rooms and painted a red or blue dot on every persons nose".
"We will open the door to the chocolate-fountain room (as it is the largest room in the prison) and everyone must go inside". He paused to take a swig from the ever-smoking ever-present flask by his side. "If the red-dots and the blue-dots successfully manage to sort themselves out and stand on two opposite sides of the room -" he paused for dramatic effect "you will all be let free!".
"Needless to say, you cannot possibly see what is on your, or anyone else's, noses right now because you are currently standing in pitch black darkness. You may discuss a strategy now, but when you enter the room (which will be lit) - No talking, winking, burping or any communication of any kind. Oh! by the way as soon as you take your place - we will mace you (the painless, raspberry flavor type) and you will get blinded!"
"Off you go" he giggles as he falls backwards through window and into the Venus flytrap.
Lo and behold! the inmates manage to complete the task successfully. How did they do it?