From Walkingpneumonia's photo shot identification I can pin prick the location of Marcia & Ron as they joined the troop of Blue-visored game players in Yoyogi Park.
The Muscle Theater was not there in 2007 when the GE image was taken. So I added it.
I'm going to guess that the clue reads something like:Take the train to Shibuya Station and join a troop of Game Show participants in colored visors in nearby Yoyogi Park.
From there they walk to NHK Hall to meet host Rome Kanda.
This shot was taken here