Keep your shirt on until the sun sets
An open button-down is acceptable and a good rule is to drop a button for every hour in attendance. Wearing a t-shirt? Sorry, you've got to follow the rule: sundown before strip-down. Why? Because the only beef up for discussion is what’s on the grill, not on your body.
“But now it’s cold out!” Too bad, Captain CrossFit. If nothing else, your steely torso will glisten all the more in the candlelight.