In martial arts novels, ancient heroes always order cooked beef when drinking. Why?

Probably because of the inherent image. Ancient heroes had to eat meat and drink wine to give people a sense of chivalry. In this way, there are fewer choices. You can think about it, what is the momentum of a hero ordering a bowl of beef and a bowl of pork in a hotel? It doesn't feel right. On the other hand, perhaps beef is rich in nutrition, which can effectively supplement the consumption in the body of the Great Xia.