The best practise room is no room at all. I am originally from Cuba and the guys there love to practise in open parks and stadiums. Arturo Sandoval used to do this religiously. There are countless guys that have Arturo's sound and power there and they credit a great deal to practising outside. I used to practise in a farm under a Coconut tree in Cuba. Since moving to NYC I have had a difficult time finding the same practise situation!