Muk-Bang is a new trend in S. Korea where people pay to watch other people eat online.
Alright, so standard fare for a lot of young to middle age Koreans are "Nights," short for "night club." They are also sometimes referred to as "booking." Basically at the places, you go with a group of friends, in the same gender. After paying an entrance fee, you can either get a table or a room (guys). Girls who come (also in groups) pay a smaller fee and are basically taken around table to table or room to room by the staff, meeting as many guys as possible. A girl could of course take one look and decline to even join your party for a drink.
The goal is to get as many numbers as possible and then you spend the next week arranging a rendezvous. Repeat the next weekend (though Thursday is a big night). Though really you are just looking for quick company for the week, people will often also go home with someone from that night as well. Most big nights are affiliated with a decent business hotel for just this purpose. The more common nights are affiliated with some love motel or a group of love motels in that area.
And it's really, really common. Different age ranges go to different types of nights. Younger college kids pretty much go for a one night stand then and there. Or just to have fun with the experience. Those aimed at young adults are a significantly more expensive and geared towards finding a few people to meet later on in the week. Hit the late 30s and it's a less glamorous affair and pretty much strictly as much wham bam thank you ma'am as possible. Cuz ladies has needs too (and the husbands aren't providing it).
The majority of Korean-Americans I know go to these places at least once a month. Including married ones.
But pretty much only works for Koreans and Korean-Americans.
They're a sort of insular group of people for sure, but this is less true within Korea. They do definitely have a tendency to stick to their own outside the country though. When I was working in a logistics company, we did a lot of traveling to Rotterdam. The hotel our company used was near one of the few Korean restaurants in the city. My coworkers...several of whom visited Rotterdam at least four times a year, ate exclusively at this restaurant. Lunch and dinner. Wouldn't eat anywhere else.
Southeast Asians are significantly friendlier. I realize this is a pretty big generalization, but I'm gonna stand by it.