Sure it is an old article that just caught my eye, but I found it interesting. You could use an old laptop if it will run Win7 or set up a temp. wifi spot for a gathering. Connectify
[software web site]Unfinished Windows 7 Feature Turns Laptops Into Wi-Fi Hotspots
by Gregg Keizer, Computerworld
Oct. 30, 2009
A Philadelphia developer has rooted out an unfinished feature of Windows 7 that turns any laptop into a wireless access point, allowing other Wi-Fi-enabled devices to share the connection without special software.
Nomadio, which specializes in military network consulting and development, used the new "Virtual Wi-Fi" feature in Windows 7 to create Connectify
, a free application .... [Article continues at headline link above.]