Introverts expend energy doing the same thing. A happy hour can be exhausting, but enjoyable getting to talk to people.
I’m… somewhere in between but operate in the extremes. I can be recharged from a party and being in good company or I can be recharged by staying inside all weekend and being alone. But it’s not like both recharge me all the time, and I haven’t figured out how to predict what will be needed far in the future.
My weekend needs depend on my week I guess and how much I have been or will be interacting or traveling. I generally like people though. If I didn’t like people or didn’t want to get to know them, I can’t see how being an extrovert and around people would be a energizing.