The fallout canon actually has this vault. Unsurprisingly it was vault 69, 1000 women, one man.Appleshampoo said:500 females and one male. Me.
I'd really like to see how that bad boy works out
On a more serious note however - I'd like to create a vault where the rich and powerful are given the low demeaning tasks, and the poor and down trodden are given positions of power, just to see if those who say they could do a better job running things really can.
It'd be interesting.
Vault 68 had 1 woman and 1000 men.
Things I can think up:
The entire vault is made of see-through material. Nothing opaque is in the vault at all. No more privacy for anyone.
Populate the vault with gingers, add one dark haired individual. Fun to track hair-colour over the years.
Add the ministry of silly walks to a vault and give them the food rations to distribute amongst the other inhabitants.
A lot of subvaults making up one main vault, each containing 20ish people. Every night, people get redistributed while they sleep. Basically enforce people to make new contacts every day. Observe their interaction with the world when the vault is opened.
Supply one red vault-suit amidst all the blue ones.