There is a club in NH (near Hanover) that has very low bouncing carpet. When I bounced the ball before a serve, it didn't come back up to my hand.
I thought it was fine, once I got used to it, but one regular member there suggested using sneakers with worn out soles as the carpet sometimes grips the tread too much when pivoting, which can hurt your knee.
I think they must spend a lot of time vacuuming yellow fluff...