"Holding a gym with someone on your friends list should increase your friendship level with that person."

#PokemonGO: Not necessarily by a large amount, but it’d be a cool way for Niantic to acknowledge teamwork in that regard. Say you go out with some buddies on the same team as you and take some gyms together- it would be pretty reasonable to have that boost your friendship, yeah? Rewards could increase based on how long you hold the gym together for. via /r/pokemongo https://ift.tt/2JN8QRS