Dance cards were used by ladies back in the days when men would request to be put on their dance card, to sign up for a turn dancing with the lady. I've done this before, at a Civil War ball. It was fun. We wore them around our wrists, as I remember, they had strings to tie them on. But I think that some of the ladies had little purses for them, although I think they were drawstring if I remember correctly. This looks like a later period- Maybe late 1800's do you think? Early 1900's? So holders for dance cards could have changed.