If it is okay for Hindu saints to organize sermns and religious discourses, why ban Christians from holding 'Changai meetings' and other religious gathering. definitely this is not conversion. If someboy attends meeting of any religion, he is not converted. Such ban will e an infringeent of right of freedom of speech and exprssion.
But it is oay that metins should be held with due permission and information of district and poice authorities.to ensure maintenance of la and order.