Advised to take earring out for Jujitsu.

I got one of my ears pierced two months ago. I had my first ever Brazilian Jujitsu lesson today and was advised by an instructor to take it out during class which, yeah duh, I don't know why I didn't think about that.

Will my ear piercing stay open for the hour I take it out for? I'm thinking about taking it out in the changing room right before class and putting it back in again just after. It'll be for an hour, once or maybe twice a week. No matter what the answer is, it's coming out, but I want to know if I should bother putting it in and out or just abandon the piercing altogether?