[GLLUG] Wifi router requirements for hosting Linux box on LAN

[gvim]

I want to host a web app on a Linux box connected to a wifi LAN to 
service about 250 people in the same room which could be a large 
restaurant or pub. What router requirements should I be aware of before 
purchasing hardware? There will be an Erlang chat application running, 
some sound file uploads and maybe the odd phone video upload. I'm 
concerned about getting the right level of capacity on the router and 
what QOS I can expect with that number of users. The Linux box would be 
modest as that's not really a concern.

Any router model recommendations would be very helpful.

gvim