Cutoff shirts

The subject of men's cutoff shirts came up on another thread on the forum.
Has anyone tried to wear one where shirts were required?
If so, where was it and how did it work out?
I wanted to cut of the bottom half of an old tank top and wear it to the gym and never did.
When covid hit, I quit the gym, bought basic equipment and started working out in the basement.
Now I never wear any shirt to exercise, and rarely wear shorts for that matter.