What is a stair climbing party?

How can I put it? Let me explain my understanding more directly. The stair climbing party is a self-proclaimed name of people who like to climb all kinds of tall buildings (the specific source is unknown). Some are for excitement, some are for seeing the scenery, some are for showing off their skills ... or taking photos or taking selfies or videos ... In short, then sharing the results through the Internet. It is quite common in foreign countries, and most students will always sigh when they see it: I finally know why there are so few foreigners. There are some in China now, but they always attract attention.