Making it known you're besties with someone in the class.
People go to workout classes with their friends all the time or they make friends while they're there, or both! We're not saying you have to try NOT to make friends whether you're there with your bestie or flying solo, but when you're holding up the class because you're too busy laughing or chatting, you're actually being rude. Not to mention if you're boxing others out and being ostentatious, it's like deja vu from mean girling in middle school.
[Photo via @yogaforbadpeople]