Frequenting the bar scene, for those so inclined, is the fast track to this: "getting comfortable and feeling like every interaction with another human won't make or break you."
To learn, you need to be able to try a lot, in a consistent environment, and get feedback. Bars made it difficult to try small things, and they're a complex environment where you can't repeat the same interaction so easily.
Whereas, saying "hi" to a stranger is never that different, in terms of how it goes initially.
Whereas, when talking with people on the street, I don't care how the interaction goes. So that makes me relaxed, and the interaction goes well.
I enjoy it for the sake of it, whereas I don't enjoy clubs unless things go well.