There's still activity for capture-the-flag, but it's mostly mods like low gravity instagib or sniper only. There are two or three all CTF-Face servers that run regular weapons but with fast movement speeds that are often or normally populated 24/7. Sometimes regular or slightly faster than normal speed servers get populated which play custom CTF maps. There's still Deathmatch games to be found though I don't know much about that.
You can check this link for a list of some regular weapons servers that might sometimes be populated:
http://whippersnapper.unrealmaps.net/Servers.html
That Unreal Argentina server fills up sometimes and they do regular weapons on custom CTF maps. They also play some DM there.
There is also 5v5 regular weapons capture-the-flag PUG match activity organized on IRC, if you know how to use that. You can find it here:
SERVER:
irc.GlobalGamers.net
CHANNELS:
#speedpug,
#latinopug,
#MLUT