Very often you can observe people coming to a workshop held in some regular meeting room to find out that there is no whiteboard, the projector does not work, the presenter has some video output socket, which is incompatible with the video equipment in the room. Such things are all very frustrating because it takes a lot of time to fix, leaving less time for the actual work. What's even worse, not just one person spending the time setting this kind of issues. Everyone in this room is effectively blocked from doing anything and have to wait. Sometimes it is even better to cancel the meeting in order not to lose any more time.

It is the situation you want to avoid, and EventStorming workshops have some specific requirements that need to be addressed in advance, to avoid such confusion.