Durin is the only young person among the two tables of old men and women. The only reason he can sit here is that he's a capable fighter.
Not everyone from the Legendary Candle Dragon was present. Many from the South couldn't make it in time, and a ban on teleportation to Shangjing was one problem. Another issue is that most members of the Candle Dragon hold positions as Inspectors granted by the Royal Family. Like the Old Man, they are responsible for confronting officials, which is a retirement path for the Old Candle Dragon.
The Old Man originally followed this path, but unfortunately, Durin came along, proving to be too formidable. As a result, the Old Man had to resume his original position.
After a few rounds of drinks, the Candle Dragons cleared the table and people began to say their goodbyes. In the end, Old Pang had the Old Man accompany Lady Qi to settle the bill, then took Durin and Mr. Yan and left first.