Well it is said that sitaji lived in kareela after leaving ayodhaya and a temple is built at that place. Every year a mela is organized there. It is believed that whatever you ask for is given by the devi and in return you have to gift something. For this there is a culture of having dance of 'bednis' (ladies whose profession is to dance) and there is a open show of liquor out there. Definetly this should be one of the reasons for this stampade out there.
