We ALL are breathing the same air and putting carbon dioxide with a little moisture back out from our bodies. No matter how you breathe it in, you will.
I wouldn't join a conga line anyway because I care about the majority of other people who know how to listen to a beat and sway to it. I'd throw everyone off balance. Merlin doesn't dance on beat. I am the worst wizardress, EVER, to have anything to do with dancing in a line!! ;) :)