IF you want to run a successful business, forget the food - just pay people to queue outside. Dr Alan Tse Ching-biu, a Chinese University lecturer who helped conduct a survey of eating habits, said customers were attracted to busy restaurants, believing the food to be good and cheap. Dr Tse said the appeal of crowds was unique to Hong Kong. In Western countries people tended to avoid busy restaurants. Restaurants could attract business by employing people to pose as customers, he said.