All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
The mentioned ballet takes place in general with music melodies and the ‘Awrah (i.e. the parts of the body that must be covered in Islam) are disclosed and shaped, so these prohibitions among other prohibitions make it a prohibited dance even if it is in a studio for women only.
Allaah Knows best.