Physical visualization bubbles

Seen this week-end in Geneva at the "Fête de la Musique" (a big gig in which there are music bands everywhere in the city). Like last year, the organizers adopted the following "bubble visualization" system to show directly on the street where stuff happens. Little bubbles are located in-between areas, they shows directions to go where things happen (represented also on the ground with big bubbles): Bubble vizualiser (1) Bubble vizualiser (2)

Why do I blog this? I like this sort of real-space event visualizer, the design seems to be directly connected with trendy infoviz practices.