Studio recos please

Had my 10th session and I’ve tried Alora Pilates (intermediate group classes) and I think their classes are a bit on the easier side? Reps are up to 8-10 lang?

I love pilates and want to challenge myself but i just join through classpass which is why i can’t rly afford to do private classes. Hope u guys can reco studios na mas challenging yung mga sessions! Thanks!!