Its easy to set up. Go to SETTINGS, SYSTEM SETTINGS then set default home AND away to RANDOM. Also, random team filter to ANY TEAM and your ready to go.
Lets take the first 6 guys to sign up, preferably guys who can play a couple games this evening.
1 will play 2, 3 plays 4 and 5 plays 6. After this we will be left with 3 teams, the first two guys to schedule something here will play, leaving the third winner to wait for the championship. Make sense?! Good. You can play however you want, 7 min quarters ladder or not, for me I'll try and persuade my opponent to play a ranked game.

ANY MATCHUP GOES!! Every round is new random match!! See if we can make this happen.
1. BigStimpin
2. UclaMac
3. Doc
4. Champ
5. cougnix
6. SuperJake