You could ask someone in Dublin to pass on a message, walk over to the portal coming from the “other side”, and maybe receive your message back from someone in Japan or something :-)

Not the op, but I could imagine a series of portals in a circle formation at each site; maybe like 12 or 13 simulcast connections would be insane.

My thought was a circle/semicircle with portals on the outside angled such that other portals are not in the backgrounds of the video.