There are particular buildings in most places dedicated to promoting this garbage. They are usually run by men in long skirts waving incense around and threatening their attendees with all sorts of unpleasantness. Particularly busy on Sundays, though some of the wizards prefer Friday or Saturday. They all want you to shell out the cash which would be much better spent at your favourite knocking shop. The ladies there are far more skilled in the super-natural arts - particularly the raising of the dead.