An elderly man who was the owner of a Queens pub died yesterday when he suffocated in sludge after slipping and falling while cleaning his sewer drain. 83-year-old Luigi Cerrone was discovered at 4:45 yesterday afternoon after he had fell into the sewage drain he had been cleaning. The News lists his business as Cafe People; the Post as Prince II. Both establishments appear to be listed at the same address on Northern Boulevard in Flushing. Cerrone had been married for sixty years and was a great-grandfather. Relatives at his Bayside home who talked to the local papers told them that "Everybody loved him," and simply that "people are crying over here."