My dorm has a HUGE walk in closet the size of a small room. I have three 5-gallon betta tanks on top of my dresser, and three more 5-gallon betta tanks on a shelf I brought up from home. The closest has a light, is a low-traffic, quiet, fume-free area of the house, and has plenty of electrical outlets for their hoods and filters. Perfect!
I also have one female betta in a 5 gallon on my computer desk, and she will soon be joined by a 2.5 gallon and a second female.
Back at home, we have a large peice of furniture housing my tarantula, and a 10 gallon tank with my young CAE. (Yes, I know he will outgrow it; this Christmas, he is moving to a 30 gallon. So don't bother preaching to me.) Also in the kitchen is our 30 gallon tank with our two goldfish, soon to be updated to a 75 gallon.
That covers everyone... for now. ::evil laugh::