Gyms wars : a peacefully idea

This idea is not about the game. This is for us, Trainers.

Sometimes in a part of a city, some friends from Instinct (example) will decide to own every gyms around. But... you and your friends (or just you) from Mystic (example) want to own every gyms for the night too!

Well, you are all tired of feeding berries? Using potions? Try to battle them with the new PvP feature coming!

Let's say the winner of the battle will take down the gyms while the loser will come back home powering up his teams and thinking about being more strategic next time!