I highly recommend using ioquake3. Install it from here:
https://ioquake3.org/get-it/
Once installed, grab the latest build and overwrite the executable(s) created by the installer from here:
https://ioquake3.org/get-it/test-builds/
Then, download WFA from here and extract to your ioquake3 installation directory. A wfa subfolder could be automatically created, but if not, please create one and extract these files there:
http://demo-bs01.oxfordnetworks.net/wfa/wfa.zip
The server can be found here:
demo-bs01.oxfordnetworks.net (Default port of 27960)
If Shadowspawn is around and knows how to throw some bots on there so people can hop into a game and shoot things that would be amazing!