Whether reading body language is something that you practice in everyday life depends how your everyday life looks like.

Not bumping into other pairs while dancing Salsa on a crowded dancefloor needs the ability to read the body language to know where they will be. When it comes to experienced dancers who move fluently that works quite well. When you on the other hand dance next to a beginner who's not dancing fluently you don't know where they are going to be as easily and thing get much harder. Then it takes conscious effort to think about them.

Body language also matters for hugging other people. At least if you don't have stickers. If I go for a hug, does the other person body language prepares for a hug or do the tense up? If they tense up, I stop the hug before it really happens and therefore I don't invade the other person.