Eliminator
This format probably works best as a hat tournament set up, but could also work with team entries.
In the hat tournament scenario you get the benefit of mixing newer players with more experienced players which makes the final rounds of each match more interesting.
At the end of each point the team who scored will lose a player until the team goes down to two players.
Once you are playing two players you must alternate the two on the pitch for each point until everyone has played and then you can cycle around again (so you cannot only play your top two players each round).
Target Audience: Everyone
Advantages: Forces more experienced players to pair with newer players in the 2v2 scenarios.
Disadvantages: You might need to add some extra rules so that it isn't just the newer players going off after the first point.