I hardly ever go out on weekends?

I'm a teenager and I go to school and I socialise fine with my friends, and when the weekend comes I just like to lay in, watch tv, do homework, read and relax.
I'll only ever go out if I need to run errands like picking prescriptions or contact lenses up, go to the library, or going to a birthday/occasion meal with family.

Personally, I'm fine with doing this, but the reason why I am asking this question is because people often asking me if I'm up to anything on the weekend, how my weekend was, etc. Today somebody said to me "I can't believe I'm not doing anything this weekend…"
I was like okay?

What do people do on weekends? Even if teens do just hang out with friends, what do they do? I genuinely have no clue to be honest, and where do they get the money from?

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