Manuel Pereyra created this neat activity monitor called “3sphere”. He suggests it could be used in places like nightclubs or parties to indicate areas where the most action is going on.
A device that monitors activity in three separate locations and returns the feedback wirelessly to a mother station which gives you a representation of the average amount of activity at your chosen areas.
I like this idea. Could be very useful for conventions (to find the areas where there are less people) 🙂