Easiest way to boost this is with 6 people, 3v3 for a half court.
Now set up the crews, 2 crews, 3 people in each, make sure that no one on the opposite crew is on your friends list. You should find each other in a few searches.
Play to 21 points, if one team quits out this makes the players AI controlled so quitting out doesn't get you the win instantly you'll have to beat a team of AI's as opposed to 3 people that will let your team win.
Once the first team has gotten their win, disband both crews and start up 2 new crews with the same people as last time, you need different hosts for the crews so you can match up again.
We didn't disband and spent about 40 minutes searching, once we recreated the crews we found each other on first attempt. Not saying this is guaranteed for everyone, but it seemed to work for us.