Our team plays 3v3 exclusively and we have a strategy we call "stacking." Basically, we play as an inverted triangle (two players on the sides ahead of a single central player). Once the game has settled into a rhythm, the center play picks a side and "stacks" it by moving to that side and following that side's player on his way up.
The goal is to force 2-on-1s while the player on the other side keeps the odds in our favor. His job is to lay paint down on bunkers to allow the stack to force a 2-on-1 situation.
It's a pretty ballsy strategy and not one to be taken lightly. If anyone hesitates or goes out early, the strategy is trashed for you and your team is seperated.