Of sacred dances the most practical for a gathering is the seated dance. One sits cross-legged on the floor, and sways to and fro from the hips in time with the mantra. A solo or duet of dancers as a spectacle rather distracts from this exercise. I would suggest a very small and very brilliant light on the floor in the middle of the room. Such a room is best floored with mosaic marble; an ordinary Freemason's Lodge carpet is not a bad thing.
The eyes, if they see anything at all, see then only the rhythmical or mechanical squares leading in perspective to the simple unwinking light.
The swinging of the body with the mantra (which has a habit of rising and falling as if of its own accord in a very weird way) becomes more accentuated; ultimately a curiously spasmodic stage occurs, and then the consciousness flickers and goes out; perhaps breaks through into the divine consciousness, perhaps is merely recalled to itself by some variable in external impression. The above is a very simple description of a very simple and earnest form of ceremony, based entirely upon rhythm.
It is very easy to prepare, and its results are usually very encouraging for the beginner.