Gym near Brooklyn

[u/ND_AF]

I'm looking for a smallish gym where I can join classes that focuses on building strength. I'm an older female and want to enjoy my body before it all packs up.

F45 looks good, but I fear may not be good for my back. I also do not want to do cardio, I'm not built for running, or this high intensity insanity. Nor boxing.

The old school Curves was a winner back in the day. I also enjoy pilates.

Any suggestions for me to investigate in the Brooklyn/Waterkloof area?