Where are you located? Around here (Phoenix, AZ) there are several larger piano dealers with concert rooms. They can be hired or, in some cases, simply reserved for concerts. Perhaps they would also reserve the space just for you to play (but heck, why not invite some friends too!). It's typical for a piano teacher to have a recital in one of these spaces.This is for one or two uses, not as a regular practice space, though. Not sure what you are really asking for.
I would just go to a piano dealer and tell them you want to purchase a grand piano - like test driving a car before you purchase. Have fun!!!