Business is about taking risks, but don’t make that risk involve not booking a meeting room and hoping another meeting party doesn’t show up before you’re done.
Pro Tip: If another legitimately booked group does show up and you’re in the middle of something, don’t make eye contact with them or look apologetic. Perhaps they’ll move on to another room, or you’ll have a few extra moments to wrap up. Next time, book it first!
When arriving at a meeting, do you just open a door, walk in and when realizing that you’re in the wrong place go, “oops, my bad?”
Rather treat it like you’re arriving at someone’s house, where you generally knock before entering. Don’t be the obnoxious neighbour with no awareness.