Why is there a saying in Korea and Japan that girls can't eat barbecue alone, or they will be laughed at?

Cultural habits. Japanese and Koreans I know are used to going out for dinner with a group of people. In their understanding, a person is too lonely to eat, and may even have some psychological problems, or personality problems will attract criticism. Eating barbecue is a lively gathering place for them, and no one will be there at all. So at this point, they think China people are very strange.

The business of the barbecue shop is very good, and the difference between the consumption of one person and that of a group of people can be imagined.

Some girls are embarrassed to eat so much alone, and will be considered to be good at eating.

Nowadays, there are fewer and fewer such girls, and some of them are just the plot needs in TV dramas.