Dedicated servers are the only way for a team to play games together. No scrabbling around the web in search of some high-ping horror that just happens to have the right slots, no idiots leaping in the split second your Medic times out, no being trapped under the imperial yoke of someone else's rules and favoured game options.
Whether you want to play a game, mode or mod that simply isn't that popular online, or to avoid a particular map in regular rotation, here's how to do it.