This is funny as a meme but don't give anyone any drugs they don't know they're taking, not even weed. You don't know what they're already taking (or abstaining from) just to be "normal," and you don't know their genetics.
Now, if you're already a buncha potheads, planning this together, and having one brave person "admit" to HR that he "accidentally" brought the wrong batch of brownies his wife had made for her Baked Bridge party instead of the straight ones he had baked, could give the whole team a reprieve as well as a hilarious workday