Thanks all. There is absolutely no room under there for a keg.
It's really just a dry bar so the most I'll do is put up shelves along the back wall for alcohol. There is enought room for our little fridge behind the bar though, provided I ever get around to having it fixed.
The light bleed is emense, but thats kind of what I wanted since the room sort of doubles as a solarium. And the floor is just painted concrete, that is until I can afford hard wood.
The one thing I noticed today was an increase in the tanks temperature. The room does heat up due to the south exposure and patio doors, so I'll have to remember to keep the curtains drawn.