If you are sleeping there and you plan on lots of body fluids being strewn about, two queens is the way to go.  

Unfortunately, I don't fit well on a queen, so I have my outcall and call maid service and go eat while they are laughing at the used wrappers, lube  and batteries.

Two queens sounds pretty gay to me.  Not that there's anything wrong with that.

There's nothing like being able to stretch out and roll around without worrying about falling on the floor.

... hmmm, good points about each.  Maybe I'll get a cot!