I can imagine a lot of similar places in offices. Cubicles could have antanae attached or be made of a material that is more willing to reflect the beams; much easier than pulling wires.
If any of them are stationary, or mostly stationary, you might just want to run an ethernet cable. Even long ones are dirt cheap from Monoprice. For instance, I wired my iMac, my girlfriend's iMac, and leave a wire at our kitchen table, where laptops are most likely to be used, for about $12 shipped.
Transferring video files between machines is now fast, and we don't have interference from neighboring networks (or vice-versa). Ethernet also makes using distributed processing using Compressor (http://documentation.apple.com/en/compressor/usermanual/inde...) easy.
I think the issue for most is not the cost of the cables, but the inconvenience (and safety hazard!) of having cables running around the house. They also typically tend to look untidy.
For me it'a a decision between a wireless router (which I would need anyway) for $180-odd or an additional $200-$300 to get CAT6 wired up to two (2) rooms in the house w/ 2 sockets per faceplate (and a cheap switch to aggregate it all).
Oh—we just run it along baseboards and tape the cords in place.
Of the dozen devices in my room right now, six are able to be connected and, of those, four are.