I was there today too, from about 1-2. Same thing, was asked to leave because it was a closed practice.
When I first got there, it was only Kemba shooting around the gym, with a couple of the women's players on the other end of the court. Other players started coming out of the tunnel one by one, and by about 1:15, they were all out there. Same setup as babysheep had mentioned. JC in the stands and Blaney running some drills.
Oriakhi, Drummond, Olander and Wolf went to one side of the court and worked on their low post game. Even though it was practice, Drummond looked like he was putting effort in and not just going through the motions. He didn't look like he was hurt to me. But the kid is a monster. There was no hesitation on his part to dunk the ball every chance he got, which was pretty much every time he got his hands on the ball. I loved seeing that as soon as he got his hands on the ball, he went up immediately and slammed the ball. The past few years, in my opinion, it seems that when our bigs get the ball in the low post and they are open, they sort of wind up before dunking the ball. Not Drummond, from what I can tell.
I walked through today and was wearing a blue hoodie with a white shirt and black shorts. I asked a couple people if they knew if the practice was closed for today. It was around 1:25 Did you see me?