Notice how similar and yet unique each of these are.  The one on the left is probably a classical dancer - she's got a fancy short skirt with pleating on it.  She may be holding a small hand drum, but this is definitely a dance thing.  She's got armlets, a hair bun (maybe dreadlocks).  The one in the middle is a much rougher carving.  The limbs aren't quite as realistic and the detail is fuzzy.  My belief is that this is a man.  You don't often see ladies without significant boobs in Indian sculpture.  The right most may very well be a tribal person.  That particular leaf-like skirt shape is usually affliated with tribal people.

One thing worth noting from a dance perspective - see how very different the torso positions look.  Not one of them is dead center.  I would say that the right most is doing a deliberate chest slide, while the one in the middle might just be a little off-center.  The one on the left seems in control, and very grounded.  The right most has also tilted the pelvis, while the other two are more or less parellel to the ground.  It's hard to tell whether all three of these are really doing the same basic move.  These could even be three different types of dance, each one focusing differently on the body.  In classical Bharata Natyam, you are either doing for a very centered and grounded position, or you have very deliberately found balance in sliding the torso off the line of the hips.

In all three, though, there is a definite repetition to have the knees out to the side, and very much bent.  All the dancers have their hair up off their necks and garments that do not interfere with bent knee dancing.  In fact, all three have clothing that draws attention to the arms, torsos and knees.