Well, Katinca and I have a room dedicated to the computer, and twirling. IT has UV lighting and enough room for two ppl on poi, or one person going off on poi or controlled staff

Oh yeah - I can point my Stereo's speakers into the room too - just for tunes 
We are happy when its raining, and we are twirling away warm inside.
NO sound complaints yet, and we were groovin twirling to the beats til about 3am on Saturday night...
I definitely think twirling in confined spaces cramps your style...but it also makes you good at spacial awareness...which is also important when twirling at parties and stuff..
out,
Josh