A: Peruvians greet each other by, uh, at least I do, by kissing — kissing the other person like, cheek to cheek on both sides.

L: Ah, like la bise in france.

A: Yeah. And whenever you go to, like, a gathering of some sort, you have to greet every single person. Like, when you enter they do that, and other people, when they enter are expected to come by and do that. And when you’re leaving its the same thing. 

L: Oh god, how do you–how do you–? Is 50% of that time just spent greeting and —

A: It takes like, ten minutes to leave. You don’t have to do it to, like, there are exceptions. Like, uh, you don’t have to do it to, like, people that aren’t Peruvian. You don’t do it to Americans. You don’t have to go looking for all the kids. Only the ones that are, like, are around. 
L: But it’s like, aunties, uncles, grandma, and grandpa are a must?

A: Mm-hmm.

Thoughts:

The first thing that came to my mind upon hearing this folk tradition was how similar it is to the la bise tradition in France. Both of these traditions are greetings where people kiss each other on the cheek. To learn about the similar French custom, please visit https://www.cia-france.com/blog/culture-french-traditions/la-bise-in-france/ .

The informant is Peruvian, so it is most likely that Spanish colonization brought this custom over the pond to this South American country.