Just as the title says, i doubt anyone hasnt played any dungeon keeper, but here it goes for completion sake:
Dormitory (lair): place for creatures to make a bed to rest and refill their HP, nothing will join you without a few blocks of it
Feedery (hatchery): creates chickens for your creatures to eat, basic room to attract creatures
Treasure room: stores gold, basic room to attract creatures
Training room: Your creatures train here to rise its levels, it cost a bit of gold to train them. it attracts warrior minded creatures
Library: Place to research and advance in your specialization tree, or alternatively if thats never implemented to research rooms and spells; it attracts inteligent creatures like the cultist or warlock.
Forge: this room is needed for traps and doors to be crafted, it attracts blacksmith type creature to work on it.
Prison: Defeated enemy creatures are locked here, when they die of hunger they return as an skeleton
Torture Chamber: captured creatures can be tortured here to reveal information on their keeper or join your side, it attracts a S&M creature
Guard Post: any creature dropped here stands on guard until it gets tired, should it attract something?
Graveyard: corpses are stored here, when enougth of them have rotted, a creatures appears.
Special rooms:
Dungeon heart: destroy others to win or loose yours and get a "game over"
Portal: creatures join youfrom it once it has been claimed and their room requesites are meet
Hero portal: only heroes spawn from them, destroy at all cost
Bridge: to pass water or lava
*Proposal* - Special monuments with some power, like mana fountains, unlimited pot of gold or access to a spell not available by any other means.
Specialized keeper rooms: All of them are just proposals and they all attract a special creature and promotes basic creatures
War:
"Arena": creatures battle each other when dropped here, free training but creatures get injured and near death, creatures become happier
"fire pit": ???? no idea for a function, attracts special creature, promotes basic creature
Magic:
"Dark temple": creatures generate mana by praying, happier creatures.
"Hall of the dead":???? no idea for a function,
Stealth:
"Casino": Gets money, happier creatures (Jackpot winner!!)
"Den of thieves": ???? no idea for a function,