On the funnier side of things, a hidden benefit from BJJ is that you won’t mind when people get up close and personal. That doesn’t mean you’ll go looking for it, but most crowd experiences become a lot more bearable after you spend so much time in the weirdest possible positions, compressed by another human being’s body parts. The North-South position springs into mind as a good example.
I’ve heard people say that as a species we are intended to be in close contact with other humans. Whether or not that is true training BJJ certainly ticks that box and will make you more comfortable around people in general.