Comment Try and Extricom (Score 2) 251
I used to set up networks for training and conferences my group did. We picked up an Extricom http://www.extricom.com/. I never had problems in the dozen times I used it.
Its an interesting system, it has a central Wifi unit, and you run cat-5 out to 4 remote transmitters. You can place them spread out over the area.
Admittedly the model I used, the Extricom ESX400 and 4 radios no longer seems to be available but check it out.
-Joe