Making it known that you're sleeping with someone in the class.
Never understood how couples can work out together. People look their most unf*ckable when they're working out, that's just a straight up fact. Well, unless you're ridiculously in shape - we're talking Instagram famous in shape! But nothing makes me gag more than when a couple comes into a class or gym. Throw in some synchronized calisthenics that culminate with holding hands or a kiss and I'm going to legit vomit.
[Photo via @theclassbytt]